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Foundations of Audio: Delay and Modulation
John Hersey

Foundations of Audio: Delay and Modulation

with Alex U. Case

 


In this installment of Foundations of Audio, author Alex U. Case explains the fundamentals of delay and modulation effects and how to apply these effects, technically and creatively, to improve the sound of a mix. The course covers adjusting individual parameters such as delay time, level, and feedback; working with long delays to create echoes, enhance groove, and add support; using delay modulation for chorus and doubling effects; and dialing-in spectral effects from delay, such as flanging. This course also includes Get in the Mix (GITM) sessions for both Avid Pro Tools and Apple Logic Pro. Exercise files are also included with the course.
Topics include:
  • Adjusting the delay time, level, and feedback parameters
  • Utilizing a low-pass filter and polarity reverse
  • Setting up an effects loop
  • Setting the delay time by tempo or by ear
  • Understanding the distinct uses of short, medium, and long delays
  • Adjusting modulation rate, depth, and shape
  • Adding double tracking and spreader effects
  • Manipulating tone with constructive or destructive interference
  • Creating a comb filter and flange effect

show more

author
Alex U. Case
subject
Audio, Mixing, Music Production, Audio Foundations, Audio Effects
software
Logic Pro , Pro Tools
level
Appropriate for all
duration
2h 17m
released
Jan 18, 2012
updated
Apr 18, 2012

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Introduction
Welcome
00:04Hey, I'm Alex Case and welcome to Foundations of Audio:
00:07Delay and Modulation!
00:09In this course, we'll look at the most common delay and modulation effects,
00:12including echo, slapback echo, double tracking, chorus, flanger, and comb
00:19filter effects.
00:20You may not have heard of all of these effects by name, but I'm certain you've
00:24heard all of these effects in the music you listen to.
00:26I'll start by covering the fundamentals of delay, including the devices that
00:30make it and how they make it.
00:32Then I'll break down the common controls of the delay effect, showing you how to
00:35set the delay time, level, and feedback parameters.
00:40I'll demonstrate how to utilize long delay times for specific effects such as
00:44delaying single words --
00:46(music playing)
00:46-- creating groove delays on guitar tracks, and making use of slapback echo.
00:51I'll then explain how to utilize modulation rate, depth, and shape to create
00:57chorus, double tracking, and spreader effects.
01:01I'll then cover techniques for making use of constructive and destructive
01:06interference to create effects that manipulate tone such as flanger and
01:10comb filter effects.
01:12Lastly, I'll integrate all of this and discuss how to use several types of
01:15delay in one full mix.
01:17(music playing)
01:25Throughout the course, I'll also provide you with guided exercise content in the
01:28form of Get in the Mix demonstration sessions that you can open up in your own
01:32digital audio workstation.
01:34Now let's get started with Foundations of Audio:
01:37Delay and Modulation.
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What you should know before watching this course
00:00In this course, we'll be covering many basic and advanced topics about delay and
00:05modulation, but we break the process down step by step so that all of these
00:10effects are easily understood.
00:12I'll demonstrate some approaches and then you'll get the chance to do
00:15it yourself.
00:16I designed this course to be accessible to everyone at all levels of
00:20audio experience, but rest assured, if you're new to this, you will not
00:24be left behind.
00:25However, you'll find it quite helpful to have some basic working knowledge of a
00:29digital audio workstation.
00:31If you need a refresher on the basics of digital audio recording, mixing, and
00:36signal flow, you may want to check out the Essential Training Course appropriate
00:40for your digital audio workstation in the lynda.com Online Training Library.
00:45Otherwise, if you're ready, I'm ready.
00:47Let's get started.
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How to use the exercise files
00:00If you're a premium member of the lynda.com Online Training Library, or if you're
00:04watching this tutorial on a DVD-ROM, you also have access to the raw audio
00:08material used to create the exercise content as well as all other audio examples
00:13featured in this course.
00:15Inside the exercise files folder, you'll find a folder for each chapter
00:19containing the WAV files used throughout the course.
00:22These files can be imported into your own digital audio workstation and used to
00:26follow along with the material.
00:28If you're a monthly member or annual member of lynda.com, you don't have
00:32access to the raw audio files, but you can follow along from scratch with your
00:36own assets.
00:37For members at all subscription levels, I've provided you with guided
00:41exercise content in the form of Get in the Mix demonstration sessions that
00:45you can open up in your own DAW.
00:47Watch the video about Get In The Mix content to learn more about this unique
00:51learning experience.
00:53So let's get started.
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Using the "Get In the Mix" Pro Tools session files
00:00This course features Get In The Mix exercise content, living sessions with
00:05built-in demonstrations and practice material for you to use with your own
00:09digital audio workstation or DAW.
00:12Using your DAW's video track capabilities, I'll guide you through automated
00:15audio examples, demonstrating a number of the concepts and techniques
00:19discussed in this course.
00:21And all you need to do is press play.
00:23Since the files are actual native high- fidelity project files, purpose-built for
00:28your specific DAW, you can manipulate the audio examples yourself.
00:32So feel free to pause, rewind, repeat, and zoom-in on sections during the
00:36demonstrations to solidify your knowledge.
00:39Get In The Mix project files also feature additional practice tracks, so you can
00:43explore the techniques you just learned on your own.
00:46These tracks are labeled practice and their content is located at the end of the
00:50demonstration material.
00:52Before using Get In The Mix content, you must first download the package
00:56prepared for your specific DAW from this course's page in the lynda.com
01:00Online Training Library.
01:02Inside this package, you'll find the Get In The Mix files.
01:05Throughout the course, I'll direct you to open these files when appropriate.
01:08If you have this course on DVD, the Get In The Mix files are included on
01:13that DVD.
01:14Unlike premium exercise content, Get In The Mix content is available to all
01:18lynda.com subscribers.
01:20If you are premium subscriber, you also have access to the raw audio material
01:24used to create the exercise content, as well as all other audio examples featured
01:29throughout the course.
01:30So download the appropriate content package and get in the mix.
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1. Understanding Delay
What is delay?
00:00Delay is likely the most underappreciated effects device we have in
00:04the recording studio.
00:05Until you've seen it and heard it in action, it's hard to imagine why delaying
00:09audio has any musical purpose.
00:11But believe me, it's rich with musical potential.
00:14However, before we get into the studio use of delay, let's talk a little
00:18bit about its origins.
00:20We've all heard echoes before.
00:21Shout into a tunnel, a canyon, or any large reflective space and whatever
00:26you shout bounces back.
00:28That's delay at work.
00:29Simple enough the audio signal, your voice, is delayed by some amount of time
00:33before being heard again later; an echo.
00:36Delay, as an effect in music production, first came about by using well,
00:41slightly misusing analog tape machines, getting them to record a sound and then
00:46an instant later play it back.
00:49Throughout the 50s and 60s, tape-based delay became a staple of pop music and it
00:53became part of the signature sound of artists like Les Paul and Elvis Presley.
00:58Here we see an analog tape machine.
01:00Note the locations of the record head and the playback head.
01:03More importantly, recognize that there's a bit of distance between them.
01:07To create a delay effect here, a signal is recorded at the record head, gets
01:11printed on to the tape, and with tape rolling, that recorded signal makes its
01:15way from the record head over to the playback head, taking time to do so.
01:20Finally, that signal is played back off tape.
01:23The result is a tape delay.
01:25The signal is delayed by the amount of time it takes the tape to travel from the
01:28record head to the playback head.
01:30The actual delay time then is a function of the speed of the tape machine and
01:34the particular make and model of tape machine which determines the physical
01:37distance between the two heads.
01:39And here's what this effect sounds like.
01:43David: Hey Alex, how does this sound?
01:45Do I sound like Elvis yet?
01:47Alex: Yeah, David. Elvis, exactly.
01:51Let's do the hairdo next.
01:56We'll discuss how to create exactly this type of slapback effect echo later
01:59in the course.
02:00But to make the most of those audio examples, let's first discuss the
02:04fundamentals of creating delay effects.
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Creating delay effects overview
00:00Delayed audio signals can be created in a number of ways.
00:04So far we've talked about making them with an analog tape machine.
00:08However, you'll most likely be using digital delay effects inside a digital
00:12audio workstation, your DAW.
00:14DAWs are particularly adept at handling delay effects.
00:17And unlike their analog counterparts, DAWs can be programmed to create any sort
00:22of delayed audio signal exactly as we require.
00:26You'll find a variety of plug-ins that can create delay-based effects in
00:29your DAW.
00:31To better appreciate what's going on in a delay, let's take a closer look at
00:34our audio.
00:36A waveform can be shown as a simple plot of amplitude versus time.
00:40That's it.
00:41Amplitude, how much signal, and time, when did it happen.
00:44Your music, your art, is entirely represented by just two dimensions,
00:49amplitude and time.
00:51When we introduce delay effects, we're simply grabbing that time dimension and
00:55bending it to our will.
00:57What happens when we hear an echo?
00:59It's a straightforward concept.
01:01Audio goes in, it waits however long you specify, audio goes out.
01:06We see here how a single snare hit becomes multiple, repeating, and
01:11decaying snare hits.
01:13We'll dial in effects like this later in the course.
01:16Simple on the surface, this process of temporarily storing a sound for some
01:20defined amount of time and repeating it an instant later becomes the building
01:24block for a vast range of effects.
01:26It's an essential, I'd even say required processor in all recording
01:30studio environments.
01:32Your mastery of delay is therefore critical to your studio success.
01:37So let's learn more about it in the next movie.
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Delay time, level, and feedback parameters
00:00Conveniently, most delay effects have many of the same features and parameters.
00:05What I'll be sharing with you in this course will apply to all delay effect
00:08plug-ins, the ones you already have in your studio and others you may acquire
00:12in the future.
00:13Three of the most important delay settings are input/output level, delay
00:17time, and feedback.
00:19Input/output levels are pretty self-explanatory.
00:23The goal is usually to set input and output levels so that there's no
00:26significant gain change happening as a result of passing the audio through
00:30the delay.
00:31That is we use the faders in the DAW, or on the mixing console, for major level
00:35adjustments and try to pass signals into and out of the delay processor without
00:39too much level change.
00:41Watch the input level to make sure the device isn't overdriven to the point of
00:44distortion, unless of course distortion is part of your intended effect.
00:49Next, we need a way to adjust the timing of the delay.
00:52So a time parameter is provided.
00:54You can set your delay in standard units of time like milliseconds, or by a
00:58direct reference to your song's tempo in various rhythmic increments like eighth
01:02notes or quarter notes.
01:04For plug-ins and outboard digital processors, you can freely adjust the
01:08delay time to taste.
01:09On a tape delay, you're a little more constrained.
01:12Your only means of changing the delay time is to change the tape speed or to
01:16change the distance between the record and the playback heads, or get another
01:19tape machine if you're feeling ambitious.
01:21While delay time adjustment seems almost trivial on a digital delay, we can
01:26become better mix engineers when we learn from history.
01:29Once upon a time, not very long ago really, the delay parameter itself was
01:34rather crude, offering no numeric readout.
01:37On old analog delay lines and most early digital delays, you turn the delay time
01:42setting to the left to shorten and to the right to lengthen.
01:45There was no numeric readout.
01:48I mentioned this bit of anachronistic charm to emphasize an essential point.
01:51The delay time can be set by ear, not by eye.
01:55I'll go further.
01:56The delay time should be set more by ear than by eye.
01:59So listen, please listen to the sonic implications of your delay time setting.
02:04What might look good on the screen or check out mathematically when you setup
02:07the device, may not make much musical sense when you listen to it.
02:12So set the delay time control to the right sounding value.
02:15I'll show you how to set the delay time by ear and in mathematical relation to
02:19the song's tempo in upcoming videos in this course.
02:23After level and delay time comes feedback.
02:27Feedback, sometimes called regeneration, is another common feature in almost
02:30all delay processors.
02:32It allows us to send the output of the delay right back into the input.
02:36With this parameter, our delayed signal gets delayed yet again.
02:39Strange at first, you'll soon see that it offers intriguing possibilities.
02:43Through this feedback control, a single echo can be made to repeat.
02:47It can repeat as many times as we like.
02:49(music playing)
02:53Level, delay time, and feedback, but we're not done.
02:56I'll show you some additional delay parameters in the next video.
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Utilizing a low-pass filter and polarity reverse
00:00Our discussion of delay parameters so far has covered level, delay time,
00:04and feedback.
00:06A lot of effects can be built with just these parameters alone, but more
00:09cool features await.
00:11Another common parameter in delay devices might be a bit surprising at first,
00:15a low-pass filter.
00:16Low-pass filters attenuate high frequencies but allow the low frequencies
00:21to pass on through.
00:23Utilizing the low-pass filter to reduce the high frequencies in your delayed
00:26signal can be effective way to create the illusion of distance for elements
00:30in your mix.
00:31It can help to push your track back deep into the mix away from the listener.
00:36In addition, attenuating the presence range of the delayed signal, the
00:39mid-frequencies, can help prevent some delay effects from cluttering the mix and
00:43distracting your listener.
00:44In this way, the low-pass filter helps us fit more pieces into the mix without
00:48things getting too crowded.
00:50A potentially distracting delay effect can settle neatly into a full mix with
00:54just a little bit of this low-pass filtering.
00:57Many types of delay effects I'll be covering in this course benefit from having
01:01some of the high-frequency content of the signal tamed.
01:03Fortunately, the low-pass filter is a common part of many delay effects and is a
01:07clever, stock feature in the delay processors we'll be using.
01:11Now let's discuss the last of our five delay parameters, the polarity switch.
01:16This switch turns things around a bit for interesting results.
01:20Take a look at this simple waveform.
01:23Reversing the polarity simply reverses things vertically.
01:26The part of the waveform above the line is now mirror imaged below.
01:30And the below-the-line portion flips up with the exact same shape to a
01:33position above the line.
01:35Have you ever seen the woofer and a loudspeaker move?
01:37Music hits and the loudspeaker cone snaps forward and back.
01:41The sounds we hear come from the motion of that speaker cone which vibrates very
01:44quickly back and forth, forward and back from 20 to 20,000 times per second or
01:48more as it reproduces the music.
01:51When the loudspeaker reproduces a kick drum sound, that sound might begin with
01:55the woofer cone moving towards you only to move back and forth repeatedly.
01:59Polarity reverse swaps the motion of that speaker cone.
02:02Reproducing the same kick drum, the woofer with the polarity reversed would
02:06first snap back away from you only to vibrate back and forth.
02:10If you want the sound of a kick drum or a piano or a vocal to be reversed in
02:14this way, hit the polarity reverse button.
02:16On its own, it's not a particularly audible change.
02:19But when your delayed signal is interacting with other signals in your mix,
02:23interesting things start to happen.
02:25You'll find times when a polarity reverse is particularly useful, and later in this
02:29course when we look at the tonal impact delays can have through cone filtering
02:32and through flanging, you'll hear this in action.
02:35The polarity reverse switch lets us shift the spectral impact of the effect to
02:39different frequency locations.
02:42The need to reverse the polarity of the delay effect is common enough that it
02:45too is a standard feature in delay processors.
02:47Input/output level, delay time, feedback, low-pass filter, and polarity reverse,
02:55these are the basic building blocks of a delay processor.
02:58Knowing how to work with these parameters prepares you to use not just your
03:02processors but pretty much any delay unit you'll ever encounter.
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Setting up an effects loop for delay
00:00To use the effects we talk about in this course, we need to know how to set
00:03it all up.
00:05We get delays into our mix by setting up an effects loop.
00:08The effects loop is the path our audio takes as it goes from the source track
00:11into the delay processor and back to the mix.
00:14We've got to hook this up right, or none of our mix ideas can be realized.
00:18Beginning with the track we want to process, we need a way to tap into the
00:22signal and send it to our delay.
00:24In order to hear that delay, we feed its output to the mix too.
00:28Typically, an auxiliary send and return structure is employed using bus
00:32outputs and so-called aux returns to get our signal into the delay processor
00:36and then back into our mix.
00:38While simply inserting a delay directly on the track might work, we commonly set
00:42up a type of delay effect that we want to use on more than one track.
00:46Using the aux send and return approach means that when we dial up a delay-based
00:49effect we like on the guitar, we can also apply it to the piano or any other
00:53instrument by raising the appropriate additional aux sends feeding the exact
00:57same instance of the effect.
00:59In the next couple of movies, we'll take a look at how to set up an effects loop
01:02in some common digital audio workstations.
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Setting up an effects loop in a DAW
00:00Pro Tools, Logic and all DAWs make it easy to add delay to your session.
00:04Pro Tools provides a representative example.
00:07Seek out the Essential Training title for your particular DAW in the lynda.com
00:11Online Training Library for a deeper exploration of this process as it applies
00:15to you.
00:16Pro Tools provides two signal flow structures for introducing effects to your
00:20session, and both the signal flow and the nomenclature are borrowed directly
00:24from large-format analog consoles.
00:27So if you happen to recorded Led Zeppelin in the 70s, Tears for Fears in the
00:3180s, or Pearl Jam in the 90s, then you already know what to expect.
00:35The two approaches are inserts and sends.
00:38Inserts locate the plug-in directly in the signal flow of the track, the entire
00:42track feeds the plug-in, and the plug- in output feeds right back to the track,
00:46making its way to the fader and into your mix.
00:49Inserts are an all or nothing sort of approach, you either have the effect
00:53or you don't.
00:54Insert and activate an effect on the track and you only hear the affected track.
00:59None of the unaffected signal gets through unless the effect has a wet/dry mix
01:03parameter allowing you to mix together the desired amount of effect; that's the
01:07wet part, and original signal, the dry part.
01:10For effects like EQ and compression, inserts are perfect.
01:13The effect fixes and improves the track and there's no desire to hear the
01:17original, unprocessed, still broken unimproved track.
01:21If you're using EQ to tame unwanted shrillness and add needed low-end power,
01:25it does our mix no good to hear the EQ'd signal and still hear the shrill
01:29low-end wimpy signal.
01:31Inserting an EQ allows us to hear the EQ track and none of that
01:35un-EQ'd disappointment.
01:37Sends offer an important signal processing alternative, one more appropriate to
01:41using the delay effects we discuss in this course.
01:44It's a bit more complicated at first, but bear with me, because it's an
01:47essential skill in audio.
01:48The sends structure begins with a source track which itself is of course
01:52routed to the mix.
01:53The source track is also made to feed a bus, any one of the hundreds of internal
01:58buses available for exactly this purpose in Pro Tools.
02:01This mix window is a good place to view this, though you'll find that the same
02:04functionality appears in the edit window as well.
02:07This electric guitar track labeled EGT has its output assigned to the mix,
02:12otherwise we won't hear the electric guitar.
02:14Up above we have an insert section, with a send section just below.
02:19Inserts A-E offer us the chance to insert five different effects using
02:23the insert structure.
02:25The View menu reveals Inserts F-J exist, offering another five when
02:29you're feeling greedy.
02:30To keep the workspace clear, I only turn on this view of the additional
02:33Inserts when I need them.
02:37Below the inserts are the Sends A-E, five opportunities for using sends.
02:42Well, no, wait, as is so often the case in our DAWs, there's additional
02:45capability when we need it.
02:46The View menu shows we can see Sends F-J if we wish.
02:52Let's choose an available Send.
02:54Some people start at the top, Send A, and work their way down as they need more
02:58effects later in the mix; a nice, neat logical approach.
03:01Some people start at the bottom, Send E, and work their way up as they mix.
03:04The ones closest to you, lower on the screen, near the fader, mute, and solo
03:08buttons are used first, perhaps making mousing around the DAW a little easier.
03:12I sometimes start in the middle, thinking of it as a primary effect, and I
03:15add supporting effects above and below as needed in the course of a mix session.
03:19The decision of which send to choose first is all about ergonomics and feeling
03:23comfortable with your own personal workflow.
03:25Sonically and logically, all ten sends are equal.
03:28So click a send and we observe a few choices.
03:31Up top we have no send, that's our current status, but if we ever want to delete
03:36a send we're using, clicking here turns it off.
03:38The next choice is output.
03:40Grabbing an output lets you route your audio out of your DAW through any
03:44available input/output hardware you might have to access outboard gear for
03:48an effects loop.
03:49To use a plug-in, we select the bus submenu and choose any of the more than
03:53100 available buses.
03:55Let's grab Bus 1.
03:57A Send level control opens where we raise a fader to determine how much of this
04:00guitar track will feed the bus.
04:02We'll fine-tune it as needed to suit our mix later, but for now, let's raise the
04:06fader to 0 DB, so the feed to the bus is the same level as the track's fader
04:10setting in the mix, Option + Click the fader to do this instantly.
04:15Okay, with some guitar feeding and effects in on Bus 1, we now need to insert an
04:19effect on that bus.
04:20To do this we need an auxiliary input.
04:23Insert a new track by clicking Track > New, you'll do this so often that the
04:27keyboard shortcut, Shift + Command + N will prove useful.
04:30And notice the choices in the dialog that opens.
04:33Highlighted when the menu opens is the number of new tracks.
04:36You can imagine that if you're recording drums, you'd pop open a dozen or more
04:39tracks at once, but here we only need one aux input.
04:43Next we see a menu currently at Mono that lets us choose Mono or Stereo.
04:48Mono will do for now.
04:50Next we see Audio Track is selected.
04:53If you needed a new Audio Track, you've come to the right place, but notice
04:56there are other choices;
04:57Aux Input, which we will select.
05:00Master Fader, if you want a fader to conveniently ride gain across the entire
05:03mix or some specified subset.
05:06Or you can choose a MIDI or Instrument Track for software synths and MIDI
05:10data instead of audio.
05:14Clicking Create places an aux input next to our electric guitar track.
05:18The aux input provides the full DAW functionality for not an audio track, but
05:23any live input we choose.
05:25Set its input to the bus we chose for our insert, Bus 1.
05:29To get a delay going, we simply insert a Delay on the Aux Input.
05:33Now you've got unprocessed guitar on the first fader and whatever delay effect
05:37you desire on the Aux Input.
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Setting the delay time by tempo
00:00Approximately 99.9% of the time, and I'm just guessing here, it might be 99.99%,
00:06echo should be set to a time that makes musical sense.
00:09You don't simply pick a random delay time and mix away.
00:13A musical delay time is carefully dialed in, should it repeat with a quarter
00:16note rhythm, an eighth note, a triplet, it's worth thinking this essential
00:20step through carefully.
00:22Sometimes in our search for a specific musical time value, we calculate a
00:26delay time.
00:27How is this calculated?
00:28It's time for a useful bit of algebra.
00:31If the tempo of the song is known in beats per minute, shown here as BPM, and
00:36the duration of a quarter note delay in milliseconds is desired, let's call it Q
00:40for quarter note, perform the following calculation.
00:44In music a song's tempo is notated in beats per minute, BPM, but how many
00:48minutes are in a beat?
00:50First convert beats per minute into minutes per beat by taking the reciprocal.
00:54BPM, beats per minute, becomes 1 over BPM minutes per beat.
01:00Time and minutes now needs to be converted to milliseconds.
01:03There are 60 seconds in a minute and 1000 milliseconds in a second, so 1 over
01:09BPM, minutes per beat, times 60 seconds per minute, times 1,000 milliseconds per
01:16second, leads to milliseconds per beat.
01:20Putting it altogether, the length of time of a quarter note in milliseconds per
01:23beat is given by this equation.
01:26Plug in the BPM of your tune and out pops the duration of a quarter note
01:30in milliseconds.
01:32Let's try one.
01:33A song with a tempo of 60 beats per minute ticks like a watch, with a quarter
01:37note occurring exactly once per second.
01:40Let's plop it into the equation: BPM equals 60, Q equals 60,000 divided by BPM,
01:4660,000 divided by 60 is 1,000. And we're done!
01:51A quarter note lasts 1,000 milliseconds, exactly 1 second.
01:56Double the tempo to 120 beats per minute: 60,000 divided by 120, and we're
02:02allowed to reach for a calculator if we need one, is 500, a quarter note is
02:06500 milliseconds long.
02:08Makes sense, right?
02:09We doubled the tempo, so the quarter note lasts half as long.
02:12I should mention that units of milliseconds are used here for two reasons.
02:17First, the millisecond is the magnitude most delay processors expect.
02:21Second, it typically leads to comfortable numbers in musical applications.
02:26For the frequencies we can hear and for the effects we're likely to use, units
02:30and milliseconds generate numbers of manageable size, not too many decimal
02:34places, not too many digits.
02:37Using seconds, minutes, years, or fortnights would still work theoretically,
02:41these are all units of time, but the millisecond is the more convenient order
02:45of magnitude.
02:46We could track our age in weeks or months, but I prefer using years so that I
02:51get a smaller number.
02:53Calculating first the quarter note delay makes it easy to determine the time
02:56value of an eighth note, a sixteenth note, dotted or triplet values, et cetera.
03:01For MIDI-based, clip-based, or tempo mapped projects, your DAW takes care of
03:06the math for you.
03:07In almost every delay plug-in in your DAW you'll find a Tempo Sync button,
03:11click that, and your delay effects will automatically be synced with the tempo
03:14of the song.
03:16From there you simply select the time division you need, eighth note,
03:19quarter note, et cetera.
03:21We'll cover specific examples of this in later movies in this course.
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Setting the delay time by ear
00:00If the tempo of the song you're working on is unknown, or if you're working on
00:04music that was not recorded to a click track, try using the snare to tune a
00:08delay, to set a delay time that makes musical sense.
00:12Even if the plan is to add delay to the vocal, piano, or guitar, it's usually
00:15easiest to use the snare for finding the appropriate delay time, both because
00:20it's a rhythm instrument and also because it hits so often.
00:23So much of pop music has a backbeat.
00:26The snare following regularly on beat 2 and beat 4.
00:29Send the snare to the delay and listen to the echo.
00:32Starting with a long delay of about 500 milliseconds and with some feedback
00:36to make it repeat, adjust the time until echoing snare hits fall on a
00:40musically relevant beat.
00:42If the delay falls at a nonmusical time interval, it can be pretty jarring, but
00:47when it's adjusted into the time of the music, you'll instantly feel it.
00:51It's perhaps easiest to find a quarter note delay, and with practice and
00:55concentration, finding triplet and dotted rhythms becomes perfectly intuitive.
01:00You can also make use of the delay time calculations discussed earlier in
01:04this chapter.
01:05After the delay time value appropriate to the tempo of the song is found by
01:09ear, don't forget to pull the snare out of the effects send and send the vocal
01:13or whichever track is to be treated with echo to the delay instead.
01:17That use of snare was a device for tuning the delay, not a mix move.
01:21Once the correct delay time has been found, undo the snare routing and return
01:25the snare to its rightful place in the mix.
01:28The delay now sits, ready to add the perfect echo to any track you feed it.
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2. Echo Effects
Overview of short, medium, and long delays
00:00Delay isn't one effect, it's several families of effects, and it's driven
00:04largely by the length of the delay time setting.
00:07Long delays lead to echoes, medium delays create chorus and doubling, and short
00:13delays lead to flanging and comb filtering.
00:16So any discussion of delay effects needs to begin by identifying which of the
00:20three classes of delay we're using;
00:22long, medium, or short.
00:25It's like we're ordering food at a fast food restaurant, do you want
00:28large, medium, or small?
00:30Here's how it breaks down.
00:32Long delay effects use delay times greater than about 50-60 milliseconds, while
00:37medium delays live between about 20 and 50 milliseconds, and short delays are
00:42less than about 20 milliseconds.
00:45The long delay is unique, in that the delayed sound happens so long after the
00:49source sound, we hear it as a separate event, it echoes.
00:53Just how long does the delay have to be before we hear it as an echo?
00:57Well, it depends.
00:58Our ability to hear an echo depends on the type of signal we're processing,
01:02but it's fair to say that the vague line between echo and non-echo is about
01:0650-60 milliseconds.
01:09Delay times greater than this are good candidates for echo.
01:12Sounds with delays of less than 50- 60 milliseconds are hard to discern as
01:16distinct separate events.
01:18Instead they are a different class of delay based effect, occurring too soon to
01:22be perceived as an echo.
01:24Sharp, transient, percussive sounds like drums are easier to hear as an echo
01:29than round, gentle, more sustained sounds. That's why there's no single rule of
01:34thumb for echo times.
01:35Sharper sounds like a kick drum echo at shorter delay times, closer to 50
01:40milliseconds, but rounder sounds, like a whole note on an upright bass played
01:44with a bow, they don't easily reveal themselves as a separate echo.
01:48So a delay time of 60 milliseconds or even more is needed.
01:52Philosophically, we consider a delay time long when it accesses the family of
01:57effects built on echoes, and the musical use of an audible repetition.
02:02What happens below the echo threshold at delay times less than this
02:0550-60 millisecond range?
02:08As we shorten the delay time, both the undelayed and the delayed signals start
02:12to fuse into a single sound.
02:14It's not that we no longer hear the delay, it's just we no longer hear it as
02:18a distinct echo.
02:20Instead the two signals start to sound like a doubling, like two very similar
02:24tracks being played at the same time.
02:26Is it one guitar?
02:27No, it's two.
02:28Wait, no, it's one.
02:29When we get a blur of what seems to be more then one performer playing very
02:33nearly the same thing, we've fallen into what we call a medium delay, and
02:37doubling is just a starting point.
02:39You'll soon see, and hopefully hear, related effects based on medium delay, such
02:44as chorus and thickening.
02:46But this medium delay classification has limits.
02:49You're now familiar with the upper limit.
02:51Above a delay time setting of 50-60 milliseconds, the effect transitions back
02:56to echo.
02:57Below 15-20 milliseconds, something else happens, we call this range of
03:02delays short delays.
03:04When delays are very short, they're heard as a single undelayed sound.
03:09The mix of signal plus delayed signal becomes a new entity, with a
03:12different sound quality.
03:14Comb filtering and flanging are the unique results of mixing together a source
03:18signal with a short delay.
03:20The delay time is so short that when the two signals, the original and the short
03:24delay itself are combined, they create a pattern of cycle by cycle additions and
03:29cancellations that alter the tone of the track.
03:32So in order to understand the rich production potential of delay, we need to
03:37break it down into long, medium, and short, because these three tiers of delay
03:42time have vastly different sonic outcomes.
03:44All right! Here we go, let's start with long delay.
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Long delays
00:00Let's talk about using long delays for an echo effect.
00:04Set the delay time to a few hundred milliseconds and here's what happens.
00:08(music playing)
00:11This is easy to setup.
00:13Our snare sound is essentially split.
00:15It continues to make its way to the loudspeaker so that we can hear it, but it's
00:19also being routed to a delay processor using our DAW's effect sense.
00:23The output of the delay also feeds the mix.
00:26In this way, we are monitoring the actual drumhead as well as some number of
00:30delayed repetitions.
00:32But we've done a bit more for this echo effect.
00:34Notice that the snare echo repeats several times, with each repeat fading
00:39gradually to silence.
00:40That's the feedback control in action, sending the output of the delay right
00:44back into the input, but at a rather low level, we get an additional echo.
00:49That echo is fed back as well.
00:51So like the original snare hit, it repeats again, but at an even lower
00:55level each time.
00:56(music playing)
01:00Ah! But we've done even a bit more for this echo effect.
01:04The low-pass filter is engaged here too so that each repeating fading snare echo
01:09grows more gentle and dives off into a vibey, low fidelity direction.
01:14If this were part of a complete tune instead of a single isolated snare hit,
01:18this low-pass filter would pull the listener in a bit, adding another layer of
01:22interest to the mix.
01:23(music playing)
01:27There are many opportunities to use echo-based effects in your mix.
01:31Echoes applied to your lead vocal or to individual words of your lead vocal can be
01:35a great way to add emphasis to key lyrics in the song.
01:39The echo becomes a catchy hook that grabs the listener's attention.
01:43A carefully placed echo can add meaning to the song, when the echoed word is
01:47important, ponderous, dreamy, ironic, or in some way important and unique to the
01:52content of the lyrics.
01:53Ditto for your guitar solo, a sax line, et cetera.
01:57You can use echo to highlight any section of any track in your mix and to
02:00support the performer at critical musical moments.
02:04It's a curious idea adding an echo to a snare, a singer, or any other track.
02:08It doesn't seem to have any motivation based on reality.
02:12The only way to hear an echo on the vocal of a song without the help of studio
02:15signal processing is to go to a terrible sounding venue, like an ice hockey rink
02:20or the Grand Canyon, and listen to music there.
02:23The sound of an echo across the entire mix that occurs in these types of
02:27places, places not designed for musical listening is quite an
02:30unpleasant experience.
02:32It's sonic chaos.
02:34It's hard to hear who's playing what.
02:36The lyric becomes an unintelligible mess.
02:39Echo on the entire tune is distinctly unmusical.
02:43The echoes found in recorded music tend to be used with more restraint.
02:47In some cases, the echo is added to a single track, not the whole mix.
02:52But to keep things from becoming too confusing the output of the delay is often
02:55mixed in at low level so as to be nearly inaudible.
02:59It's an almost subliminal effect at times.
03:01And a useful refinement to this approach is to apply echo only to keywords, key
03:07phrases, or licks instead of the entire track.
03:10This focuses the effect and cleans up the mix.
03:13We will hear some examples in the following several movies.
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Get in the Mix: Using long delay on key lyrics
00:00Let's use echo to emphasize key lines and phrases in our mix.
00:04We are going to setup the DAW for a delay effect,
00:06dial in an appropriate long delay time, and add some nice details.
00:10So let's get in the mix.
00:12Pause this movie and open the appropriate file for your DAW.
00:15If you don't have access to a DAW right now, you can continue watching this
00:18video to see the Get In The Mix demonstration.
00:27The addition of echo to a track is pretty simple to do, but we will need to keep
00:30an ear on the musicality of the effect.
00:33First, I'll add a quarter note echo to an entire vocal track.
00:36You will hear that this crowds and confuses the mix.
00:39To fix that problem, I'll limit the delay echo to a few discrete
00:43key words instead.
00:45Then I will fine tune it all by finding a more appropriate echo time.
00:48Instead of a quarter note, a half note feels right.
00:51And the effect grows more interesting still when followed by a fading repetition
00:55a quarter note later.
00:58Echo was added to this vocal by using an aux in feeding this delay plug-in.
01:02The duration of the delay time has been aligned to the tempo of the song using
01:06the Tempo Sync capability built into this and most other delay plug-ins.
01:10I'll start with a quarter note duration.
01:13First, I will play the mix without any delay on the vocal, and then I'll
01:16automate the Bypass button engaging the delay and bringing the echo into
01:20the mix.
01:21(music playing)
01:53To my ear, no amount of fussing with level or panning makes this echo
01:56particularly helpful to our mix.
01:59Too loud, and it's distracting.
02:01Too soft, and it adds nothing beautiful, nothing useful to the overall sound
02:05of the song.
02:06And in between, well, there is no perfect in between.
02:10This always-on vocal echo is always annoying.
02:12It's never musical.
02:14A more typical echo effect is to emphasize only key words of the vocal instead
02:19of the entire performance.
02:21I created a new audio track and I placed in it a copy of the lead vocal track.
02:25I then deleted everything but the words I wish to send to the echo, being
02:29careful to offer clean, quick, click free fades at the beginning and end of
02:33each word.
02:34I think the words wishing well are begging for a lonely, reverberant echo.
02:39This new key word track feeds only the effects loop to the delay.
02:43It doesn't go to the mix.
02:44Remember, these words are still present in the original vocal track, and I don't
02:49want to double these words by having them come from two tracks simultaneously.
02:53This new track feeds the delay not the mix.
02:56We don't hear the new track directly, but the delay processor does.
02:59(music playing)
03:12Okay, it's getting better.
03:14The echo no longer annoys, but it's hardly adding to the mix.
03:18Now we've got to do a bit of fine tuning.
03:20Let's try adjusting the delay time.
03:22Let's compare the sounds of the phrase with that quarter note, then a half note,
03:26and then a whole note echo.
03:27(music playing)
04:05The interesting emotional potential of the echo is starting to be revealed,
04:09though you owe it to yourself to spend a lot of time exploring this.
04:12I hear the quarter note echo was crowding the line, and the whole note echo
04:15was a bit too late.
04:16I'm liking the half note echo.
04:19But let's do a bit more with it.
04:20Let's let it repeat using the feedback parameter.
04:23(music playing)
04:38Hmm. That's too much. Feedback which sends the output of the delay back to the input
04:43causes any number of gently fading repetitions.
04:46While appropriate in other contexts, I don't what even a small cloud of repeats.
04:50A single repetition might be better.
04:53So we turn off the feedback and activate the second delay tap.
04:56I explored this for a while and I found I like the repeat best when it came a
05:00quarter note after the first echo, sort of haunting and lonely, yet
05:04rhythmically appealing.
05:05(music playing)
05:18We can hard pan them.
05:20(music playing)
05:33But I like when they're tucked in a bit.
05:34So I'll pan them part way back towards center.
05:37(music playing)
05:49Finally, add a bit of EQ to the echo that thins the spectral content to
05:53something closer to a whisper, and give it some reverb and these echo
05:57slide nicely into place.
05:59Let's hear it from the top.
06:00(music playing)
07:05That echo was the perfect mix embellishment for a rich, lyrical idea.
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Get in the Mix: Establishing groove with long delays
00:00Well timed long delays, echoes, are an excellent way to fill in part of the
00:04rhythm track of a song.
00:06Reggae is famous for its clich? over the top echo.
00:10Drum programmers have been known to put an eighth or a quarter note delay across
00:13the entire groove in some dance music, and guitarists use delay too.
00:17Let's go into the Live Room where David has his guitar running through a delay
00:20effect and give it a listen.
00:22(music playing)
00:41In this example, David played just a few notes and the delay filled in the rest.
00:45This repeating echo becomes an integral part of the performance itself.
00:49Now let's add some excitement to a song with a bit of echo-based
00:52groove enhancement.
00:53Time to Get In The Mix.
00:55Pause this movie and open the appropriate file for your DAW.
01:02The bridge of this tune is pretty wacky, but it's on purpose.
01:05That's what I'm going for.
01:07(music playing)
01:34There's a lot going on here, but top of the list is some groove echo I've
01:37added to the driving strums of that acoustic guitar.
01:40(music playing)
01:47This tune features a common challenge, a surprisingly simple instrumental
01:51arrangement needs somehow to rise to an occasion.
01:54In this case, there's the thrilling vocal arrangement that is the focal point
01:57of the bridge.
01:59We just need to get the relatively simple rhythm section underneath those vocals
02:03to grow stronger and more exciting.
02:05Sure, some added electric guitars or well-designed synth parts would do the
02:09trick, but here I'd like to go for an emotional lift through mix moves only.
02:13I want to try to make the acoustic guitar swirl and move and groove and to
02:18communicate excitement.
02:20And don't forget, the repeated lyric here is the title of the song, This
02:23Time Around.
02:24The word around naturally invites some emotion, some well-placed echoes on the
02:28acoustic guitar might be just right.
02:31(music playing)
02:59The guitar echo is built from five taps of a multi-tap echo, a delay with at
03:03least five individually adjustable delays.
03:07We need to place the resulting echoes into the mix in a way that supports what
03:10the guitarist is playing.
03:12It's always the case that the engineer must get along well with the guitarist.
03:17We definitely want musically relevant delay times for each of these delay taps.
03:21We're thinking in terms of quarter notes and half notes, not in terms
03:24of milliseconds.
03:25So using the Tempo Sync feature of the plug-in is a big help.
03:30Good rhythmic syncopation of this sort performance will come from patterns
03:34built on 16th notes.
03:36(music playing)
03:41Tap 1 is set to a quarter note which is of course 4 sixteenth notes.
03:46Tap 2 is a dotted quarter note made up of 6 sixteenth notes.
03:51Tap 3 is set to 10 sixteenth notes.
03:55This one might be a bit confusing at first.
03:57I think of it as 8 sixteenth notes which is a half note, plus two more sixteenth
04:02notes, which delays it all by a further eighth note.
04:06A delay of a half plus an eighth means the echo falls on the upbeat half a bar
04:11later, a classic syncopation move.
04:15Tap 4 lands with a rhythmically strong eighth note anticipation to a full
04:19bar delay.
04:21And Tap 5 is that one whole bar later, 16 sixteenth notes of a delay.
04:27I spent some time with this trying many different patterns and I'm currently
04:31liking this sort of pattern, and in fact, I prefer it with the first Tap
04:34turned off.
04:35(music playing)
04:40The levels of these delay taps follow a typical strategy that later echoes are
04:45quieter than earlier echoes.
04:47You can see them falling off to -3 then -6, and finally -9dB.
04:52The left/right panning of each delay is quite important here too, and reminds us
04:57of another creative variable we have to work with even as we play with groove,
05:01stereo.
05:03You can of course keep the entire effect mono, but it's common to add motion to
05:07the mix by ping-ponging the delays back and forth across the mix.
05:12A hard-panned left to right ping pong is rather a blatant effect.
05:16So I placed the early echoes closer to center and the last delay is hard-panned.
05:22So as this effect unfolds, the echoes grow slightly lower in level and pan
05:26gradually farther out to the side.
05:28(music playing)
05:33This pattern isn't the only option.
05:35With groove-based echoes you get to explore, create, and express yourself.
05:40What I like most about this pattern is how the late echoes act as a sort of
05:44anticipatory acceleration back to the strong down strum on the downbeat falling
05:49on beat one of each bar of the bridge.
05:51It creates a kind of crescendo that we built from our echoes.
05:55(music playing)
06:08These echoes form a pattern that fits with the performance and adds to the mix.
06:12(music playing)
06:40I should point out that I didn't use that early quarter note echo.
06:44It was helpful to have it on while explored all the options, but just because
06:48the plug-in gives us the delay output, doesn't mean our mix needs it.
06:52The quarter note at Tap 1 crowded in too close to the performance and it
06:56interfered with the groove the guitarist established.
07:01This groove echo pattern turns out to have other uses.
07:04Listen to the acoustic guitar part immediately after the bridge.
07:07(music playing)
07:25Echoes can linger and churn faintly beneath the track to give it support, to
07:30help it keep up with a busy mix.
07:32The elegantly simple two note alternation part that follows this bridge is
07:36melodically grounding even as the choruses grow more exciting, but we need to
07:41help this humble acoustic guitar to keep up with the rest of the mix.
07:45Low-level echoes can do the trick.
07:47(music playing)
07:53We get just a bit of extra energy and time blurring to help this simple part
07:58get heard in the mix.
07:59Letting the prior note linger on as the guitarist plays the next note lets
08:03them overlap more, upgrading a melodic part to something with more harmonic
08:07interest too.
08:08(music playing)
08:28In this way, a pattern of rhythmic echoes can provide a bed of support, a
08:32foundation for a track in need of subliminal sonic enhancement.
08:37Acoustic guitar, background vocals, harmonica, falsetto voice, triangle rhythm
08:43patterns, any fragile sound might welcome exactly this sort of treatment.
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Get in the Mix: Creating slapback echo with long delays
00:00A popular sound in 1950s Rock, slap-back echo, is sometimes part of
00:04a contemporary mix.
00:06If you've heard Elvis sing, you've heard slap.
00:09Guitarists playing the Blues sometimes reach for it too.
00:12It adds liveness and excitement wherever we use it.
00:15So let's go to the Live Room where David is playing the drums.
00:17In the control room we will add slap echo.
00:21Alex: All right David, we're rolling.
00:22(music playing)
00:32Alex: Let's add some slap to that.
00:34(music playing)
00:43This single audible echo between about 80 and 200 milliseconds adds a
00:48distinctive bounce and pulse to every drum hit.
00:51On a vocal, slap echo can add a retro feel to the sound.
00:54Elvis and his contemporaries reached for this effect so often that it has become
00:58a clich? that's evocative of the time.
01:00Listeners today associate slap back with those happy days of the 1950s.
01:05You can almost hear the fins on the car.
01:08On a solo instrument like guitar, or a rhythm instrument like drums, slap echo
01:12makes a performance sound more live, putting the listener in the noisy bar
01:16with the band.
01:17It reminds us of the music club with that short echo of sound bouncing off the
01:21back wall of the venue.
01:22To add slap to a mix, all we need is a long delay of about 120 milliseconds and
01:27a track to put it on.
01:29Let's Get In The Mix.
01:30Pause this movie and open the appropriate file for your DAW.
01:38I've added slap echo to the guitar part on the track labeled EGT, which is how
01:42I abbreviate electric guitar in most sessions, by setting up a standard
01:45effects loop.
01:46The electric guitar feeds a Bus to the aux input labeled slap, which in turn
01:51has a slap echo plug-in inserted.
01:54While you might find plug-ins specifically named slap echo, or find delay
01:58plug-ins with presets labeled slap echo, the fact is any delay capable of delay
02:02times in excess of 120 milliseconds will do.
02:06The plug-in opens with these default generic stereo delay settings.
02:10I'll take it from generic to specific by dialing in delay times left and right
02:15of about 120 milliseconds, choosing slightly different delay times for each side
02:20leads to a spatially wider more interesting effect.
02:23Let's listen to the delay as I pull the left sides delay time down, which is too
02:27long and distracting, to something just above 120 milliseconds.
02:31I'll then pull the right delay time down to a value just below
02:35120 milliseconds.
02:36(music playing)
02:49That's not a bad sound.
02:51The guitar feels a bit more retro, a bit twangier.
02:54It has a distinct character. Compare the dry sound to the version with
02:57slap echo.
02:58We'll play them back to back, first without slap, then with the effect.
03:02(music playing)
03:16It certainly isn't always the right sound, but in a mix crowded with too many
03:19midrange parts, too many guitars, pianos, synths, strings, horns, you name it,
03:25try making one track unique with a little bit of slap echo.
03:29Push the effect a bit, making it a bit more obvious by adding some feedback.
03:34Now the slap echo bounces energetically on just a bit longer.
03:37(music playing)
03:51If the slap is a bit too distracting, and that's a risk, engage a low-pass filter
03:56and strategically dull the sound a bit.
03:58The slap is still audible, but without any rhythmic hiccup.
04:02Listen as I pull down a low-pass filter in the slap delay.
04:05The sound really starts to change when we fall below the strong presence
04:09range, about 4 kHz.
04:11I'll push it even a bit lower to something between 2 and 3 kHz.
04:15(music playing)
04:29Add a bit of short ambient reverb to the delay and soften it further while
04:33adding more to that live feeling.
04:35I'll unmute the send and add a plate reverb sound with a reverb time near
04:391 second, just a touch of this is all we need.
04:42(music playing)
04:55The guitar sound has really transformed now.
04:57(music playing)
05:24I must emphasize that this effect is very much about rather subtle audio
05:27qualities, like character and flavor.
05:30You have an important aesthetic choice to make when you dial in a slap echo,
05:34changing the type and the amount of reverb, the cutoff frequency of the low
05:38pass filter, the amount of feedback, and the delay time settings; these all
05:42affect the sound.
05:43Spend some time massaging these values until you find a quality you love,
05:48or even an ear-grabbing sound you hate, but love to hate.
05:51And if your collection of plug-ins includes more than one type of delay suitable
05:55to this challenge, well, you've got to try them all.
05:58Even the type of delay itself contributes to the sound.
06:01Some delays are pristine and high fidelity, others are a bit grungy, grainy,
06:07dull, or in some way low fidelity.
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Advanced tape-delay effects
00:00If you want to create tape delay and happen to own your own tape machine, or work
00:04in a studio with one, or are simply tape curious, this movie is for you.
00:09A tape machine represents a mechanical source of delay.
00:12Usually, a tape machine has only a few tape speeds and thus only a few
00:15delay times.
00:17Sure, it might cost several thousand dollars for those few delay settings, but
00:21it is a way to create delay.
00:23Tape delay was originally used, because it was one of the only choices at
00:26the time.
00:27It's still used today so we'd like to know more about it.
00:31Using a two track recorder is a bit clumsy, so manufacturers solved the problem
00:35by introducing tape-based delay units.
00:38These were tape machines with a loop of tape inside, where the spacing between
00:42the record and the playback heads could easily be changed to make the delay
00:46time adjustable.
00:48Nowadays, studios have more options.
00:51Life is good.
00:52Today, we can buy a digital delay that is easily adjustable, wonderfully
00:56flexible, cheaper than a tape machine, and it either fits in one or two
01:00rack spaces, or exist conveniently in a pulldown menu in our digital audio
01:04workstation.
01:06Why bother with tape delay?
01:07There is one major reason and it's the most important motivator in our field.
01:12Sound.
01:13Some great sounding, old recordings made effective use of tape delay.
01:17That's inspiration enough for some engineers.
01:19Retro for retro's sake.
01:21Tape delay is such a unique sound, so rich with character and subtleties
01:26that plug-in makers continue to try to emulate it to import those sound
01:30qualities into our DAW.
01:32While these emulations might sound great, there is no way they can exactly match
01:36the sound of your tape machine.
01:38You should go to the trouble to use a tape delay when you really want
01:41that sound.
01:42An analog tape machine introduces it's own complex, but understated
01:46coloration to the sound.
01:47It adds a slight low-frequency lift to the frequency content of the signal.
01:52The exact frequency and gain of this low-frequency emphasis depends on your
01:55tape machine.
01:56The tape speed, the tape gauge, and how the machine is calibrated.
02:01If you push the recording level into the red, that signature sound of analog
02:05tape compression is introduced.
02:07At hotter levels still, saturation distortion, a sound wholly unique to
02:12analog tape results.
02:14So as it turns out when we give it a closer listen, tape offers far more
02:18than just delay.
02:19It's a delay plus equalizer, plus compressor, plus distortion device.
02:23It can be darn difficult to simulate digitally.
02:27It sometimes the perfect bit of nuance to make a track special within the mix.
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3. Modulation, Chorus, and Doubling Effects
LFO
00:00We've gotten a lot done with delay so far using the parameters of level, delay
00:04time, feedback, low-pass filtering, and polarity reversal.
00:08It's time to take it to the next level using what are known as
00:11modulation controls.
00:13Modulation is simply a secret codeword for change.
00:16We want to introduce a way for the delay time to fluctuate during the song.
00:20The delay effects we've discussed so far, echo for emphasis, echo for groove,
00:25and slap back echo, use only a static delay.
00:28Interesting new effects can be built on a changing delay time.
00:32And while we might manually change the delay time ourselves, a recorder delay
00:36time changes into the mix automation system.
00:39It is really useful to have the delay processor itself introduce the change.
00:43And this is done using a simple low-frequency oscillator or LFO.
00:49The LFO is an oscillating waveform that drives the delay time parameter.
00:52We don't listen to this signal.
00:54Instead, the delay time is controlled by it.
00:57If the LFO is a slowly moving sine wave, then the delay time parameter will
01:01sweep slowly with a sine wave trajectory through a range of delay times.
01:06If the LFO is a quickly moving sawtooth wave, then the delay time changes more
01:10quickly in a sawtooth pattern.
01:13The LFO has three simple properties, rate, depth, and shape.
01:18Rate is the frequency of the LFO.
01:20Remember, we aren't listening to this signal.
01:22It's only used to change the delay time parameter in our delay processor.
01:27Rate specifies whether the manipulation of the delay time will be slow, quick,
01:31or somewhere in between.
01:34Depth is the amplitude of the LFO.
01:36It determines the amount of change to the delay time.
01:38Do we modulate that delay by 5 milliseconds, 50 milliseconds, 500
01:43milliseconds or more?
01:46Shape is the waveform of the LFO.
01:48A sine wave is common.
01:49It changes the delay time in a regular sine wave pattern through the range
01:53of delay values you specified using depth, doing so as quickly as you
01:57specified using rate.
01:59But a sine wave is not the only choice.
02:01The delay changing trajectory might follow any standard waveform, sawtooth,
02:06triangle, and square waves are common LFO shapes.
02:08And maybe most interesting of all, many delay processors let you select a random
02:13wave shape so that the delay time moves without the regular pattern of the more
02:16structured, repeating wave shapes.
02:18This can lead to a more organic form of modulating delay.
02:22Mastering the modulation section of your delay by understanding these LFO
02:26building blocks, opens the door to a variety of new delay effects, doubling,
02:31chorus, spreaders, thickeners, and flanging are all built on changing delays as
02:36we discuss in the upcoming videos.
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Get in the Mix: Modulation rate and depth
00:00Delay effects based on a changing delay introduce a whole new layer of
00:04interest to your mix.
00:05A changing delay is an ear-grabbing alternative to the fix delay, and it has an
00:09intriguing side effect.
00:11Changing the delay also changes the pitch.
00:14The slow modulation of delay time that is common in so many effects, introduces a
00:18slight detuning of the track.
00:20A moving delay leads to a wobbling pitch.
00:24We have to be careful here, because an out of tune track can sour
00:26any production.
00:27But if the delay modulation is slow, the pitch bending might be a
00:31subtle positive.
00:33It can sound human and expressive.
00:35On the other hand, if you want an aggressively altered pitch pattern as part of
00:39a special effect, don't hold back, and let a modulating delay do the job.
00:44So let's listen to what the modulation section can do.
00:47We will start here with the modulation rate and depth and cover modulation
00:51shape in the next video.
00:58Rate controls how quickly the delay time parameter within the effects device
01:02has changed.
01:03You'll find mix situations when you want to sweep the delay time imperceptibly
01:07slowly and other times where you need a fast, very audible rate.
01:11This electric guitar provides a good illustration.
01:14The electric guitar abbreviated EGT, feeds a Bus to the aux input labeled Echo,
01:19which in turn has a medium delay plug-in inserted.
01:22(music playing)
01:36Adding a fixed medium delay with a duration around 30 to 40 milliseconds creates
01:41a kind of doubling effect.
01:43An effect we explore in more detail later in this course.
01:46Hear how it almost sounds like two guitars?
01:49(music playing)
02:02Modulating this delay transforms and upgrades this effect substantially.
02:06I'll raise the depth now so that the modulating LFO has some amplitude, so that
02:11our delay is ready to change when we turn on the modulation section next, which
02:16we do by raising the rate control to just a fraction of a hertz.
02:19(music playing)
02:33Now it's starting to sound interesting, like two guitars.
02:36It seem our ears, our minds really, are quite intrigued by even a slightly
02:41changing delay time.
02:43To understand this better, let's do something a little unconventional.
02:47While this isn't a typical approach during a mix, I'll temporarily convert the
02:52aux-in we are using for this delay into a pre-fader send.
02:56This means the electric guitar signal that's fed to the delay plug-in is
03:00actually sourced from a point in the DAW before the electric guitar fader
03:04and mute functions.
03:05We usually don't use a pre-fader send on effects, because we want the effect to
03:09rise and fall proportionally, as we raise and lower the electric guitar track in
03:13the mix as needed creatively.
03:15Push the level up a bit for excitement one moment, and pull it down so that it
03:19doesn't drown out the vocal the next.
03:22So a post fader send to an echo effect is typical.
03:25But we use a pre-fader send here so that we can mute the guitar track and
03:29still hear the echo.
03:30It's a good way to start to hear what's going on.
03:33So listen to the output of our slowly modulating delay alone, and I'll increase
03:38and decrease the rate control while we listen.
03:40(music playing)
03:54When the rate control is high enough, we hear a strong pitch wobble.
03:58That's the sound of a changing delay causing a change in pitch.
04:02As the delay times sweeps up to a slightly higher value, the pitch drops down.
04:06When the delay times sweeps back down to a lower value, the pitch swings
04:10back up.
04:11Pitch change is an inevitable side effect of delay modulation, even at this very
04:16slow modulation rate, the guitar is slightly detuned.
04:19(music playing)
04:33If you aren't noticing the pitch wobble here, don't worry.
04:36It's subtle and slight.
04:37But it's absolutely there, and it's an essential part of effects like doubling,
04:42chorus, spreaders, and thickeners discussed elsewhere in this course.
04:46We may not hear a pitch change directly, but our ears and brains do grab onto
04:51something different.
04:52Let's add the original electric guitar back into the mix and listen to what
04:55happens as even this very slowly modulating delay is pulled down to a rate
05:00of zero hertz.
05:01No modulation.
05:02(music playing)
05:16Hear how the effect becomes much more disappointing when it's a static
05:20medium delay?
05:21As soon as the delay time is changing even slightly, so slowly that we don't
05:26actually hear a pitch change when listening to the delay alone, the effect
05:30becomes indescribably more interesting.
05:32When two guitarists play the same part they're never perfectly synchronized.
05:38We know that note for note, one guitar will play a fraction of a second ahead of
05:42the other, and I'm not picking on guitarists here.
05:45Any two musicians will exhibit at least slight performance timing variations.
05:50This medium delay effect is a starting point for simulating two guitarists
05:55from one.
05:56But a modulating delay adds more realism to this effect.
06:00With two different performances, that time offset between them doesn't
06:04remain perfectly fixed.
06:06It flexes and moves humanly, a bit early one moment and a hair later the next.
06:11The modulating delay is therefore far more convincing than a fixed delay at
06:15creating a doubling or chorus effect.
06:18And file this observation away.
06:20Fixed delays lead to great effects, but changing delays, even slowly changing
06:25delays, lead to surprising, textually strong results.
06:30You owe it to yourself to explore this.
06:33Depth controls how much the delay is modulated.
06:36It bounds the delay time at the extreme, defining the shortest and the longest
06:40delay times allowed.
06:42The original fixed delay time might be increased and decreased by 5
06:46milliseconds, 10 milliseconds, 15 milliseconds, or more.
06:51Listen to the delay output with rate set to a couple of hertz and depth cranked
06:55to its highest extreme.
06:56I'll then reduce the depth to a more modest level.
07:00Listen carefully to how the extreme pitch wobble is narrowed.
07:03(music playing)
07:17At high depth settings I'm getting a bit motion sick, is the guitarist on
07:22a boat?
07:23Reducing the depth control doesn't stop pitch shifting from happening, but it
07:27tames it significantly.
07:29Depth controls the tonal range of delay modulation, and rate controls how fast
07:34it gets there.
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Get in the Mix: Modulation shape
00:00Modulating delay effects represent so many opportunities for creative
00:04signal processing.
00:05We have mastered the rate and depth controls in the prior movie, let's tackle
00:09the shape control next;
00:10it's time to Get In The Mix.
00:12Pause this movie and open the appropriate file for your DAW.
00:20With modulation rate and depth under our belts we can now focus on mastering the
00:25third LFO parameter.
00:27Shape is the waveform of the LFO.
00:30It describes the trajectory of the delay processor as it changes the delay
00:34time within the bounce set by the depth control, at the speed determined by the
00:38rate control.
00:40The two most common modulation shapes we're likely to see are sine wave
00:44and triangle wave.
00:46Let's apply them to our electric guitar track.
00:49Here's the guitar with a sine wave modulated chorus effect.
00:52(music playing)
01:06And here it is with the triangle wave modulated chorus effect.
01:10(music playing)
01:23If you're thinking they both pretty much sound like a chorus effect with only
01:27slight differences in quality, you're right.
01:30The primary use of the shape control on most delay effects is to introduce a
01:34slight change in character to the effect.
01:37You simply choose the one that sounds better to your ear for that track, in that
01:41mix, on that day, but we can hear deeper into this by using a sine wave test
01:46signal to evaluate the effect of modulation shape.
01:49(tone)
01:59Let's insert this chorus on the sine wave.
02:02(tone)
02:13Wait a second, what's going on?
02:15It doesn't sound like a sine wave anymore.
02:17Let's figure this out.
02:19Recall that a changing delay causes a changing or shifting pitch.
02:22Well, that's all I have done here.
02:24Subjecting a 400 Hz sine wave to a changing delay will change the pitch of
02:28that sine wave.
02:30Listen again to the sine wave as I turn the effect on and off.
02:34(tone)
02:47Here is a better way to hear the effect come and go.
02:50I automate the depth to move up and down while we listen.
02:54With depth at zero, we hear the sine wave unmodulated, it's a pure tone, a
02:58single frequency.
03:00As I raise and lower the depth, the pitch bending comes and goes.
03:03(tone)
03:18It's a sine wave all right, but the modulated delay makes the pitch wobble,
03:22almost like a vibrato on a musical instrument.
03:25Now let's return to the shape of the modulation.
03:27(tone)
03:41The exposed pitch impact of delay modulation shown here is quite helpful.
03:46Moving the delay with a sine wave LFO bends the pitch up and down smoothly with
03:51that familiar shape of a sine wave.
03:53(tone)
04:07Moving the delay with a triangle wave LFO snaps the pitch of our source signal
04:11back and forth between two pitches.
04:13(tone)
04:28While a sine wave sweeps smoothly up and down, curving back and forth
04:32continuously, the triangle wave has two slopes with a sharp turnaround at
04:36the top and the bottom.
04:38The triangle wave has two states, it's either moving up or it's moving down,
04:43it's a straight-line slanting up and then it's a straight-line slanting down.
04:47A changing delay leads to a changing pitch.
04:50If you change the delay in a steady way, you create a steady amount of
04:54pitch change.
04:55When you keep increasing or decreasing that delay at a fixed rate, you change
04:59that pitch to a new fixed frequency.
05:02So the upward slope of the triangle wave leads to one new steady pitch and the
05:07downward slope of the triangle wave leads to a different new fixed pitch.
05:12The result is interesting, a sine wave now snaps back and forth between
05:16two pitches.
05:18Let's compare again the smooth bending of pitch by a sine wave LFO to the
05:22toggling back and forth of pitches by a triangle wave LFO.
05:26(tone)
05:40With that in mind, maybe we can hear what's going on a little better with a more
05:43complicated musical signal, like the electric guitar.
05:47(music playing)
06:00It's still might be subtle.
06:01If we take them to extreme settings, clearly new sonic possibilities emerge
06:05for each LFO shape.
06:06(music playing)
06:33The choice of shape of the LFO can be tricky.
06:35The sound signature of the sine wave LFO is that smooth continuous sweeping
06:39of your sound.
06:40The signature of the triangle wave LFO comes in two places, that steady up then
06:46down motion tends to create two forms of steady new sounds, and the sharp
06:50turnaround at the top and bottom of the triangle, the kink in the waveform, often
06:55creates an instantaneous sonic artifact.
06:59Look for other wave shapes available on some delay plug-ins.
07:02Sawtooth and square wave LFO shapes have their own strong sonic qualities.
07:07Variations on the triangle wave sounds you've just heard.
07:10A random shape is provided on some delays, all the other shapes have some
07:14regularity to them, and that can reveal the ghost in the machine.
07:18The repeating pattern, whatever it is, sine, triangle, sawtooth or square leads to
07:23a pattern shifting of sound qualities.
07:26Making the delay move more randomly can lead to a more organic, less
07:30predictable dynamic.
07:33At extreme settings the wave shape has a clear impact.
07:36At more modest settings the choice of wave shape is more about just choosing
07:41the slightly better one expressing your taste, your opinion, for this detail in
07:45a mix.
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Delay effects examples in various plug-ins
00:00Having a long list of delay plug-ins to choose from can be intimidating at
00:04first, but I have some good news.
00:06When you learn how to use one delay, you've pretty much mastered all of them.
00:10The basic parameters of level, delay time, low-pass filter, feedback,
00:14polarity reverse, modulation rate, and modulation depth are all found on
00:18almost every delay processor.
00:21This is one the most basic delay plug- ins you might find, but it's rich with all
00:25the controls we discussed.
00:26We have level control shown here as gain, we specify the delay time here, there
00:32is a low-pass filter, feedback, polarity reverse and a modulation section.
00:38Because it's a plug-in, it has a view to the tempo of your project if you're
00:41using the tempo maps within your digital audio workstation.
00:45This lower section lets you take advantage of that, to simply specify the delay
00:48time in musically useful amounts, entering a quarter note or a dotted eighth
00:53note, or any other musical value, instead of a delay time in milliseconds.
00:58(music playing)
01:11Here's a more advanced delay plug-in, a 6-Tap delay from Waves.
01:15The six simply refers to the number of delay outputs this plug-in has.
01:19Even this more complicated plug-in still has the familiar fundamental
01:22parameters we like to see.
01:24It's got a global level control and a global delay time. Then each of the
01:29six delay taps has its own individual level, delay-time, and low-pass
01:34filter, and here's feedback.
01:37With so many delay outputs, we add the ability to pan each of the six outputs to
01:41any location in the stereo field leading to some nice spatial effects.
01:45(music playing)
02:12Delays come in many flavors sonically and in terms of user interface.
02:17The Waves H-Delay, or Hybrid Delay has all the usual culprits present.
02:22We see output level, delay time, filters, low-pass and high-pass on this one,
02:27polarity reverse, and a modulation section.
02:30This delay also adds some adjustable coloration to the signal, with an ear on
02:33some vintage delay lines that were themselves not exactly high fidelity devices.
02:38This LoFi button pulls out the high frequencies from the delay.
02:42It alludes to early digital delays which ran at such low sample rates that
02:46depending on the make and model they sometimes couldn't encode audio much
02:49above 6 kHz or so.
02:51We know we're lucky to be alive in audio at this moment in history.
02:54Our high sample rates today mean we can work with audio systems that are clean
02:58and full bandwidth, but a strategically narrow-band can help some tracks play fair
03:02with all the other tracks in the mix.
03:04LoFi means our delay won't compete with the other tracks at high frequencies.
03:09Another source of sonic character on this delay is the analog parameter. Turn it
03:13off and this delay is clean and pristine.
03:16Engage any one of the four analog modes for unique character, largely tonal,
03:20inspired in part by older analog circuits and tape machines.
03:23For some applications, we like the character and charm of the imperfections of
03:27old, and this plug-in makes it possible.
03:30It's got a lot going on right now, let me strip it down and then build back
03:33up to this.
03:37(music playing)
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Medium delays
00:00Medium delays represent their own family of effects.
00:04This time window, greater than about 15 to 20 milliseconds, but less than about
00:0950-60 milliseconds creates effects known as doubling, chorus, spreading,
00:14thickening, and more.
00:16As we've seen and heard earlier in this course, echoes live at delay
00:19times greater than this.
00:21Medium delay effects exploit the fact that the delay can be too short to be
00:25heard as a separate echo.
00:27Simply lowering the delay time into this medium-range gives you access to
00:30new sounds.
00:31It converts your delay processor into a new effect.
00:34Of course, it's the same effects device, but when it is set to a medium delay
00:38time, completely different effects are created.
00:42And in this middle zone of delay times we're going to take strong advantage
00:45of the modulation section of the delay processor to make these effects more
00:49powerful still.
00:51Shifting delay times are an essential part of the doubling, chorus, spreading,
00:54and thickening effects.
00:56With echoes mastered, let's get to know the effects that live in the band of
00:59delay times known as medium delays.
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Get in the Mix: Chorus
00:00An alternative name for the heavy use of modulated medium delays to simulate
00:04more than one player is chorus.
00:07The idea is that through the use of several different modulating delays in the
00:1120 to 50 millisecond range, one could transform a single track into the sound
00:16of several voices.
00:17The delays simulate other voices singing along but phrasing things a bit
00:22late, humanly out of sync.
00:24The modulation of those delays introduces small amounts of pitch shift,
00:28creating the illusion of a natural amount of pitch variation for these added
00:32simulated performers.
00:34No two performers sing with identical pitch and phrasing and 40 singers would
00:38create 40 unique sounds even as they try to sing together.
00:42Modulated medium delays evoke the sound of several simultaneous performers,
00:47converting one voice into a choir, thus the term chorus.
00:52Naturally, stacking up to 39 medium delays around one single live vocalist will
00:57not convincingly sound like a choir of 40 different people.
01:01Think of it instead as a special electronic effect not an acoustic simulation.
01:06And it isn't just for vocals, while we might instinctively avoid walking into a
01:10room with 40 actual guitarists, it turns out that the chorus effect on a single
01:14guitar track makes it richer and lusher, converting a six-string guitar into a
01:1912-string like sound.
01:20(music playing)
01:32Chorus is a kind of pop-polish that fits in the certain mixes, and plan to get
01:36creative because there is no reason we can apply this mix move to bass, keys,
01:40or any other track.
01:42Let's hear some examples; this is a good time to Get In The Mix.
01:45Pause this movie and open the appropriate file for your DAW.
01:53Chorus plug-ins provide us delay processors tailor-made for providing multiple
01:58modulated delays with feedback and filtering possibilities.
02:02I'll add a chorus effect to transform a two-part harmony into a richer sounding
02:06full chorus of singers; here's the original unaffected track.
02:10(music playing)
02:34Listen, as I increase the delay time on this chorus effect to a spot that sounds
02:38appealing, and makes it sound like more than two singers.
02:41(music playing)
03:02That's sounding more interesting, when the delay time is too long it reveals the
03:06effect too much and sounds like a studio gimmick, too short and the vocal starts
03:11to sound phasey and psychedelic.
03:14The happy middle ground does the best job of sounding like more people
03:17are actually singing.
03:19Okay, I admit it.
03:20There are times when the sound of a studio gimmick or psychedelic phasey
03:23quality is desirable.
03:25I don't mean to suggest the other delay times are wrong, just that they aren't
03:28exactly what I'm going for now.
03:30We make these kinds of decisions track by track and tune by tune whenever
03:35we mix.
03:36Adjusting the modulation rate and depth also reveals settings which span that
03:40continuum from obvious to not so obvious, synthesized to natural.
03:45Listen as I tweak the modulation parameters.
03:47(music playing)
04:09Again here I'm going for the most natural sound possible.
04:13Some chorus plug-ins let you pull out the lows from the effect and when they
04:16don't, I often insert a separate one.
04:18The purpose of a low-cut filter is to let the source tracks themselves be the
04:22sole source of low-end warmth for the vocals.
04:25Introducing multiple medium delays will cause variable amounts of phase-based
04:29increases and decreases in level for the slowly moving low frequencies.
04:34While this is embraced when we go for flanging effects, it undermines our
04:38purpose here.
04:39So I find it helpful to cut some lows especially for what happens next.
04:43This chorus effect is built on two modulated delays.
04:46One singer becomes three, the original, plus these two delays.
04:50In this way two singers become six.
04:53For the illusion of even more singers and the pleasure of listening to a
04:56larger-than-life cluster of voices, we can make the chorus effect richer by
04:59simply adding more voices.
05:01(music playing)
05:23Let's listen to that in the context of the mix.
05:25(music playing)
05:49Of course this is a mere starting point, you owe it to yourself to
05:53experiment further.
05:54Chorus comes in countless flavors found by exploring a vast range of parameter
05:58settings available to you.
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Get in the Mix: Double tracking
00:00All right, remember how a long delay, a delay time greater than 50-60 milliseconds,
00:05results in an audible echo?
00:07We've used delay times of 100 milliseconds or more to create interesting echo
00:12effects, but let's shorten that delay time.
00:14Pull the delay time down below 50 milliseconds, down to say 20 or 30
00:19milliseconds, do that and the sound changes.
00:22We can no longer hear the output of our delay as a separate repetition of the
00:26sound, it no longer echoes.
00:29In fact, this amount of delay time makes one track sound like two, we call
00:33this doubling.
00:35The term comes from the technique of double tracking, this is when you record
00:39your singer and after you capture a performance you think is perfect for the
00:42tune, you go and record it again on a different track.
00:46The goal is to have two perfect performances so that when you mix them together,
00:50the vocal track sounds more interesting, rich, textured.
00:54If you don't have the actual double track, you can simulate it using a
00:58medium delay.
00:59The idea is that when a singer sings the same part again, they don't do it with
01:03the exact same timing, at the exact same pitch.
01:06A modulating medium delay simulates this human performance variation nicely.
01:12Let's Get In The Mix. Pause this movie, and open the appropriate file for
01:15your DAW.
01:20Let's work here with a medium delay to create a doubling effect.
01:24Listen as we try something in the 30-40 millisecond range on a vocal track for a
01:28good clue about what's going on.
01:31Focus on the lead vocal as you listen to the end of Verse 1 and the
01:34first chorus.
01:35(music playing)
02:09Here we have a classic production challenge, creating a lift into the chorus.
02:14Musically, melodically, emotionally, we rise up from the verse to a new higher
02:19level at the chorus.
02:20In the chorus, we've got a lead vocal floating over some delicate high
02:24harmony parts.
02:25This is a good place for a doubling effect.
02:28I've instantiated a stereo delay on the lead vocal track labeled LV using an Aux
02:33Input and set each delay time to something close to 30 milliseconds, a bit above
02:3830 on the left and a tick blow on the right.
02:41To begin with I've made sure there's no low-pass filter engaged, no polarity
02:45flip, no feedback, and no modulation.
02:48This medium delay of about 30 milliseconds doesn't quite jump out of the mix as
02:52an echo, instead it sounds a little bit like a second and a third person singing
02:57the same words in melody.
02:59Actually, it's the same person singing the same thing three times.
03:03Listen for it as it comes in at the chorus.
03:05(music playing)
03:38It's a common multi-track production technique to have the singer sing the same
03:42part two, three, four, or more times.
03:44The resulting sound is stronger and richer.
03:47It even shimmers a little.
03:49This layering of nearly identical performances borrows from the tradition of
03:53forming instrumental sections in orchestras and choirs.
03:57Consider the sound of one violin, then imagine the exact same piece of music
04:02with 12 violins playing the same line in perfect unison.
04:06The value of having multiple instruments play the same musical part is
04:10almost indescribable.
04:12Adding more players doesn't just create more volume, the combined sound is rich
04:16and ethereal, it transports the listener.
04:19Doubling type delay effects can mimic this sound.
04:21(music playing)
04:43The other essential delay parameters enrich this doubling effect.
04:47Introduce a very slight amount of delay modulation to help these synthesize
04:51doublings move a little in time relative to the original source track.
04:55This helps it sound more organic, not like a cloned copy of the original track.
05:00The addition of a bit of feedback creates a few additional doubling layers of
05:04the track underneath the primary one.
05:07With these additional parameters in play across the plug-ins to delay outputs,
05:11the effect sounds even more like the lead vocal was actually double tracked
05:15twice in the chorus.
05:16(music playing)
05:49We've now taken the doubling effect pretty far.
05:52Using multiple modulated medium delays to transform one track into the sound of
05:57many, layering a voice into a choir is such a common use of delay that it is its
06:02own class of plug-in called a chorus.
06:05As with all studio effects, make sure the sonic result is appropriate to
06:09the song.
06:10The solo folk singer doesn't usually benefit from this treatment, neither does
06:14the jazz trumpet solo, but many pop tunes welcome this as a special effect on
06:19lead vocals, backing vocals, keys, strings, pads, and of course ukulele.
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Get in the Mix: Spreaders and thickeners
00:00The doubling and chorus effects we just discussed are only a starting point.
00:05Introducing multiple modulating delays with additional pitch shift, panning
00:09them out across the stereo field, we develop a class of effects we call
00:13spreaders and thickeners.
00:15These effects take an isolated track and let us increase their apparent size
00:19in the mix.
00:20It's an essential way to help one track hold its own with others in a
00:23crowded mix.
00:24For example, you might add the spreader to a vocal track to help prevent the
00:28lead singer from being overshadowed by all the guitars and synths in a full
00:32pop mix.
00:34This is an advanced mix move;
00:36it's a complicated combination of processes, so plan to spend some time
00:40fine-tuning the various parameters on each of the many delays that make up
00:43this effect.
00:44Once you've got it under control, you'll find this effect is an essential part
00:48of building an exciting mix, that helps you sound like the pros.
00:52Let's give it a try, it's time to Get In The Mix.
00:55Pause this movie and open the appropriate file for your DAW.
01:02The transition from verse to chorus is a frequent one in music, and while the
01:06songwriting and performing are the essential drivers of that emotional journey,
01:10we need to make sure that the audio engineering decisions we make are consistent
01:14with and supportive of the intended response from the listener.
01:18As we did in our earlier discussions on creating doubling with medium delays,
01:22let's focus on the lead vocal track at this critical musical moment from Verse
01:261 to Chorus 1.
01:27(music playing)
02:01Spreaders and thickeners provide one of the best solutions to this production
02:05challenge, that need for an emotional lift into the chorus.
02:09The performing artists have done their part to take the energy of the verse to a
02:12higher level at the chorus.
02:14In terms of mixed arrangement, we have a lead vocal floating over lush
02:17harmony vocals.
02:18A spreading effect introduced at the chorus is a great mixing tool for enhancing
02:23this dynamic in the song.
02:26The signal processing elements of spreading are delay, multiple pan taps with
02:30modulation and filtering, plus a small amount of pitch shifting to further
02:35detune each modulating delay.
02:37So you can create this effect with the delay only based doubling discussed in
02:41the earlier movie, followed by a pitch shifting plug-in, or you can use
02:45something like this plug-in, which has all the essential elements in one place.
02:50This plug-in for the vocal is inserted on an Aux Input labeled Spreader reached
02:55by bus from any send, in this case the lead vocal.
02:59This effect opens with two of the four voices activated.
03:02(music playing)
03:35That's a good starting point, but I want to fine-tune it.
03:38I turn off the direct sound containing the unprocess lead vocal, because the
03:42original vocal track lives on its own fader.
03:45I'm mixing the effect with a vocal in the mixer, not in the plug-in.
03:50This leaves the two voices.
03:52Reading left to right, we see familiar parameters, each voice has gain and pan,
03:57placing it in the mix under our careful control, and each voice has a Delay time
04:01parameter with feedback.
04:03So far the plug-in is provided us with the core functionality of a
04:07typical multi-tap delay.
04:09This is the first building block of the effect.
04:12The next three parameters focus on pitch;
04:15changing the pitch of each delayed signal will contribute richly to the
04:18spreading of the sound left to right in our mix.
04:22The detune parameter applies a small fixed shift in pitch.
04:26How small?
04:27Listen to the effect again and notice that while the vocal sounds different, it
04:31doesn't sound grotesquely out of tune.
04:33(music playing)
04:54Pitch shifts are expressed in cents, there are 100 cents in a dollar, and in
04:59music there are 100 cents separating two adjacent notes on a piano.
05:021 cent is one 100th of a half-step.
05:06There are fully 1,200 cents in an octave.
05:096 cents then is a tiny fraction of a half-step, 6% to be precise.
05:16So the pitch adjustments here are very slight, at 6 cents up for Voice 1 of the
05:20effect, and 6 cents down for Voice number 3.
05:24That small pitch offset is further detuned in a familiar way, using the
05:28modulation of the delay.
05:30We're offered the standard parameters of depth and rate to do this.
05:34Modulating the delay, as we've discussed many times in this course, causes
05:38pitch shift.
05:39So the spreading effect is a delay plus pitch shift process.
05:43And while two voices of this patch achieve a lot, we should listen to the effect
05:47when it's built of four voices.
05:49Here's the chorus of the song, I'll start with two voices on and turn on the
05:53other two halfway through.
05:54(music playing)
06:17This process spreads the vocal out left to right and seems to thicken the
06:22texture and harmonic content of the track.
06:24I've overdone things here a little bit to make the effect easier to hear, but
06:28also to suggest that for an attention- getting special effect, this can be a
06:32creative avenue to explore.
06:34But for this mix, I want to keep a more natural sounding vocal, so let's
06:38adjust these parameters to tuck the effect into the mix, to place it in a more
06:42supportive role.
06:44First I'll introduce some delay modulation to each voice, very much with the
06:48traditional chorus in mind.
06:50Listen as the effect grows richer.
06:51(music playing)
07:15I want the effect to be wide and harmonically thick and dense, but I need to
07:19make sure it only adds to the lead vocal without taking over the mix, so some
07:24adjustments to the level and panning bring the effect in line.
07:27(music playing)
07:50And then I set the overall level of the effect, it's too loud in the mix now, so
07:54I'll pull it down, first too far and then ride it back up, and pull it back
07:58down, all as needed until I feel like the vocal gets the necessary added
08:02strength and interest that I want it to have in this chorus.
08:06(music playing)
08:29Now, we need more context for this effect, let's listen to the verse to reorient
08:34ourselves to the sound of the lead vocal without the spreader, followed by the
08:38chorus of the tune to hear and feel the impact of this effect.
08:42(music playing)
09:46The goal here is to help fabricate that pop music, larger-than-life, layered
09:50vocals sound in the chorus.
09:51This effect does it quite nicely.
09:54I'm going to make one important change though, having the effect kick in at the
09:58chorus is great, but I'm a sucker for a bit of anticipation into that chorus.
10:03Melodically and emotionally our singer starts to rise up on the line leading
10:06into the chorus, offering a sort of emotional pick up into the chorus.
10:10So I introduce the spreader effect ahead of the chorus on that phrase right
10:14before, when she sings, we got to know exactly why we came here.
10:19Let's listen from the very top of the tune, acclimate ourselves to how the song
10:23unfolds, and make sure we've appropriately contributed to that.
10:27(music playing)
11:51This build into the chorus, based on the musical edition of the spreading
11:55effect, serves the music well.
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4. Spectral Effects from Delay
Constructive and destructive interference
00:00Multi-track mixing combines all the tracks you have into a stereo signal.
00:04Really two different signals;
00:06one intended for the left loudspeaker and the other for the right.
00:09You go from several tracks to two, but a curious thing happens when two similar
00:14signals are combined.
00:16To illustrate this important concept, let's take a look at a few simple
00:20sine waves;
00:21we'll extend the concept to more musical signals before we're done.
00:24If we combine these two sine waves, mix them together, the resulting signal is
00:28simply the same frequency sine wave doubled in amplitude.
00:32Each of the two sine waves we're mixing is the same frequency and they're
00:35perfectly aligned, moving up and down sinusoidally together.
00:39Their interaction is perfectly additive.
00:42This is known as constructive interference.
00:45But let's change the second wave, sliding it to the right along the time axis
00:49by half a cycle.
00:51If we combine these two sine waves, the resulting signal is silence.
00:55These two waves are pushing and pulling against each other.
00:58At every instant one wave is doing the opposite of the other.
01:01They are the same frequency, but they're exactly misaligned.
01:05Their interaction is perfectly subtractive.
01:08This synchronized form of opposition is called destructive interference.
01:13It took a shift to the right down the time axis to make this happen.
01:16So not surprisingly, this conversation is about delay.
01:20When we mix together any signal with a short delay of itself, constructive and
01:24destructive interference will occur.
01:26That short delay will align some frequencies for constructive interference and
01:30misalign others for destructive interference.
01:33Some frequencies get louder, others cancel out, leading to a frequency response
01:38curve known as comb filtering.
01:40We see here the frequency footprint of a short delay, and it's a deep footprint,
01:44having strong spectral impact.
01:47It's called comb filtering exactly because of this image;
01:50the frequency response gets chopped up into this pattern, which looks very much
01:54like the teeth of a comb.
01:56Because of constructive and destructive interference, mixing in a short delay
02:00will alter the tone of any track into this pattern of peaks and dips.
02:04Some frequencies are enhanced, others are attenuated.
02:08In the next few videos we'll take advantage of this to create some really
02:11interesting effects, all built on the short delay.
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Short delays
00:00Let's take stock of how much we've accomplished so far in this course.
00:04Long delays are used to create echoes, emphasis, support, groove, and slapback.
00:11Medium delays are used to create doubling, chorus, spreading, and thickening.
00:16Next we'll tackle the third and final class of delays, short delays.
00:21Short delays live entirely below about 15-20 milliseconds.
00:25When delays are this short, we get new types of effects.
00:28The constructive and destructive interference patterns, unique to such short
00:32delays, lead to strong spectral effects.
00:35A quality not part of the long or medium delay effects we've been using.
00:39Equalizers are thought of as the primary tool for altering the frequency
00:43content of a signal.
00:44In this chapter, I'll show you how short delays can be used to
00:47manipulate frequency.
00:49Add a short delay to a track and it causes that unique comb filter
00:53frequency response.
00:55Kick in the modulation section and that comb filter starts to sweep up and down
00:59along the frequency axis.
01:01We call this effect flanging.
01:03We dial-in these effects next.
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Get in the Mix: Creating a comb filter and a flange effect
00:00So far we've talked about how constructive and destructive interference leads
00:04to comb filtering.
00:06Let's see how we can make musical use of this.
00:08The comb filter frequency response represents a radical reshaping of tone.
00:13Modulating that comb filter gives us flanging, all we need is a track and
00:17a short delay.
00:19Let's Get In The Mix. Pause this movie and open the appropriate file for
00:23your DAW.
00:28Plug-ins with the word flanger in their name typically provide us delay
00:31processors with a single short delay, accompanied by all the usual parameters;
00:36feedback, filtering, polarity reverse, and modulation capability.
00:41Electric guitar offers a great opportunity for the flanging effect.
00:45(music playing)
00:59Recall that flanging comes from the mixing of a signal with a very short delay.
01:03It's most pronounced at very short delay times, one millisecond or less.
01:07But the effect remains audible up to as much as 15 or 20 milliseconds.
01:12Adding flange transports the guitar textually, spectrally, and it might even
01:17transport us a bit back in time, back to the 60s, when rock and roll guitarists
01:22first introduced us to the sound.
01:24(music playing)
01:38Longer delay times lead to spectrally rich and complex flange effects, shorter
01:43delay times create more distinct alterations to timbre.
01:46There is no right answer here, fine-tune the effect to taste.
01:49(music playing)
02:30That's the sound, the surprising vibey sound of the swept pattern of constructive
02:35and destructive interference across the entire tone of this guitar.
02:39Certain frequencies are being canceled, while others are doubled.
02:43As the delay time is modulated, the frequencies of the cuts and boosts
02:46move accordingly.
02:48Flipping the polarity of the delay shifts the frequencies of the cuts and
02:51boosts to new locations.
02:53(music playing)
03:06A great way to understand this better is to apply the effect temporarily to a
03:11pink noise test signal.
03:13Pink noise is random energy with an equal distribution across the audio band.
03:18It has as much lows, as mids, as highs.
03:21It is a distinctly nonmusical signal, but it's an interesting way to estimate
03:25the spectral content of all possible musical signals.
03:30(tone)
03:44Flanging the pink noise makes the spectral pattern of dips and bumps
03:47more obvious.
03:48(tone)
04:03This test signal now makes the sonic impact of our delay parameter
04:06adjustments quite clear.
04:08(tone)
04:47Use the noise signal to support your exploration, but don't forget, all that
04:51matters is how it sounds on the track.
04:54(music playing)
05:31Your ability to contribute to future mixes depends on your comfort and
05:35fluency with flanging.
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Get in the Mix: Flanger and phaser effects
00:00Dialing in a very short delay time and modulating it via the three delay
00:04modulation controls leads to an effect known as flanging.
00:08The only rule is that the delay time needs to be in that range short enough to
00:12lead to audible comb filtering.
00:14That suggests a starting delay setting of less than about 10 milliseconds,
00:18though the effect may be more obvious at delay times closer to 5 milliseconds.
00:22This ensures audible comb filtering will occur.
00:25Set the delay modulation controls to taste.
00:27(music playing)
00:49That ringing, hollow, ear tingling sound that is created by a flanger comes from
00:54the simple comb filter effect enhanced by these modulation controls.
00:58While a fixed short delay creates a comb filter, a changing short delay creates
01:03a sweeping comb filter;
01:05as the delay time sweeps,
01:07the tone is radically reshaped.
01:09And that's flanging.
01:10So let's Get In The Mix. Pause this movie and open the appropriate file for
01:14your DAW.
01:19The bridge of this tune offers opportunities for some aggressive shifts in
01:22the mix.
01:23A change of scene, of arrangement, or of texture, I want to sonically separate
01:28this part of the song from the rest of the verse and chorus structure in this
01:31tune, flanging immediately comes to mind.
01:35Let's listen to the bridge and for context we'll start one phrase before the
01:39bridge starts and listen onward for one phrase after.
01:42(music playing)
02:26You've probably heard this tune before elsewhere in this course.
02:29If so, you already know that this production is rich with exquisitely layered
02:33interwoven vocal arrangements.
02:36These intense vocal sections embellish not just this bridge, but also
02:40every chorus in the song.
02:42We set them off sonically in the bridge by inserting a dedicated
02:45flanging effect.
02:46(music playing)
03:09I like how this sounds, but if you were mixing and had other ideas, you keep
03:13adjusting the parameters to taste.
03:16This sort of mix idea invites you to bring your own personal touch, your own
03:19artistic maturity to the mix.
03:22Flanging is a strong effect that, if taken too far, might make the bridge too
03:26different, too weird.
03:29Transporting the bridge of this song to the 1960s with images of purple paisleys
03:34and peace signs would be a distraction.
03:36The 60s have no real connection to the meaning of this song.
03:39There's a fine line between your flanging effect being a nice touch and
03:44too much.
03:45Listen as I push the delay parameters too far.
03:48(music playing)
04:10Bear with me as I get a bit philosophical here, I think it's important for us as
04:15recording engineers to draw comparisons between the sounds we hear and the
04:19meaning we invest in them.
04:21It can be fairly abstract, it might not be the least bit obvious to the casual
04:25listener who plays the recording later, but having a mental motivation for how
04:30the mix supports the songwriting, how the engineering supports the performing is
04:34important to the success of your recordings.
04:38It reaches attentive listeners directly and casual listeners subliminally.
04:42What do you feel when this bridge ends and the next chorus unfolds?
04:46(music playing)
04:57In my mind this bridge makes me think of the following, growing layers
05:01of abstraction.
05:02First, I want the mix to support the song form and the arrangement.
05:06Verses to choruses to bridges, the mix is under no obligation to sound the same;
05:12most of the time they don't.
05:14Mixes, the faders, pan pots, and mutes are all changing, and so are many of
05:19the effects.
05:20Introducing the flange effect on these vocals is part of that.
05:24I want to sonically distinguish the bridge from the other parts of the tune.
05:29Listen, critically and emotionally to the full context.
05:32Let's listen to the full chorus before the bridge, through the entire bridge,
05:36and into the chorus that follows.
05:38(music playing)
06:42In addition to contrast, I'm also thinking that I want a bit of swirling
06:46motion in this bridge.
06:48That lyric, the song title, it's called This Time Around, makes me want some
06:52things in the mix to move around.
06:54A modulating delay does exactly that.
06:57Lastly, I really want to come out of this bridge into the final choruses with a
07:02climactic lift that all listeners can't help but feel.
07:06For the bridge, I'm picturing it woven into some sort of cocoon, followed by the
07:11feeling of a butterfly taking first flight in the chorus.
07:14Corny I know, but that's what's in my head as I set up the sonic contrast from
07:19the bridge to the chorus, tangled, tight constraint, to soaring freedom.
07:25I'm sure no listener receives the same image, but it serves as a mental template
07:29to keep me focused while mixing.
07:31Effects like flanging are so abstract and so subjective that we benefit from a
07:36bit of philosophizing.
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Conclusion
Using delays in a real-world mix
00:00A quick inventory of all the different effects a delay processor can create
00:04is in order.
00:05Short delays create a comb filter and flanger.
00:09Medium delays create doublers, chorus, spreaders, and thickeners.
00:14Long delays create echoes for emphasis, support, groove, and slap back.
00:19Let's hear many of these effects in action all in a single real-world mix.
00:23We're using a full mix by the artist Iyeoka.
00:26The song is called This Time Around.
00:28It can be hard to get oriented when you see someone else's mix for the
00:32first time.
00:33So first let me show you around, then we'll zoom in on some of the delay-based
00:37effects that became essential to this mix.
00:40For now, let's get acclimated by auditioning the mix from the intro through
00:44the first chorus.
00:45(music playing)
02:09It's helpful to understand the full song structure.
02:12Looking at memory locations I've set up, we see a pretty typical song form.
02:17The Intro, verse 1, and CHORUS 1 that we just heard is followed by verse 2,
02:22CHORUS 2, Bridge, two more repeats of the CHORUS, and a Coda or a Vamp during
02:27the fade at the end.
02:29Switching over to the edit window of the digital audio workstation and looking
02:33at the memory locations on the timeline across the top reinforces our
02:37understanding of who plays when and for how long.
02:40As we step through the many delay-based effects in this mix, you'll eventually
02:44gather more than enough comfort with a song not to feel that intimidation that
02:48comes from staring at so many tracks and so many effects for the first time.
02:52Don't worry, I've been there, I'll get you through it.
02:55Let's switch back to the mix window where we'll focus first on the vocals.
03:00In this mix, I consolidated many dozens of vocal tracks into five
03:04vocals categories.
03:06There is the lead vocal, you'll soon hear some lead vocal ad-libs for those
03:11repeating choruses at the end.
03:13Those take place here.
03:14The song also has a stereo track made up of just a few high harmonies.
03:19Every single chorus, not just the ones at the end, has a lush arrangement
03:23of background vocals.
03:24In fact, we have a stereo track made up of many layers of background vocals
03:28singing in the choruses only.
03:30Lastly, there is a stereo track made up of many layers of background vocals
03:34singing in the bridge only.
03:36Let's have a listen to the delay effects that are on the vocals.
03:39Here's the first one likely to catch your attention.
03:41(music playing)
03:57The lead vocal gets an echo, but it's only on the words wishing well right
04:01here in the first verse.
04:03Switching back to the mix window, let's solo the vocal effect.
04:08(music playing)
04:23It's done with this 2-tap delay here on the aux input labeled Key Echo.
04:28A separate track containing only these words was created labeled key words, and
04:33it's this track that feeds the delay, not the main lead vocal track.
04:37In this way, the echo happens only on the words, wishing well, not on every
04:41word of the lyrics.
04:43Delay timing, level, and panning are important.
04:46You'll spend time getting it to sound good.
04:48You want ear candy without distraction.
04:51Two additional processors help this echo slide deep into the mix.
04:55First, I added this EQ to gently pull out most of the energy below 1 Kilohertz
05:00and to roll off the extreme highs.
05:02This converts the echoes to something of a more distant whisper.
05:06I also send it to a large hall reverb.
05:09Here's what it would sound like without those added echo effects.
05:12I'll mute the send to the reverb and bypass the EQ.
05:15(music playing)
05:29Those echoes are too literal, too similar to the original vocal.
05:33I much prefer to separate the echo from the track here.
05:36Keep in mind, these effects are on the echo only, not the actual lead
05:40vocal, which in order to carry the song, must maintain its full bandwidth,
05:44its more intimate sound.
05:46Here it is again with those important added effects restored.
05:49I'll return the EQ and reactivate the reverb.
05:54(music playing)
06:08And let's hear it in the full context of the mix.
06:14(music playing)
06:28Another delay-based effect on the lead vocal is a doubling effect we've
06:32synthesized using this plug-in on the aux input labeled Double.
06:37The doubler is introduced to the mix for the entire chorus every time it
06:40happens in the song.
06:42Listen as I turn it on and off during playback, but listen carefully because
06:46this doubling effect is only on the lead vocal, the lush harmony part
06:50underneath remains lush.
06:53Try to focus on the quality of the lead vocal.
06:55When this doubler is off, it's a single great-sounding vocal track.
06:59But when it's on, the lead vocal becomes a layered doubling.
07:03Well, this plug-in creates four double tracks, so we hear the real track plus
07:07four delay-based doublings, I guess it's a quadrupling.
07:11(music playing)
07:34Have a listen to the soloed lead vocal with the effect.
07:38(music playing)
08:01The added sheen of the doubling actually makes more sense to me coming in on the
08:04line before the chorus.
08:06Let's listen to verse 1 into CHORUS 1 and note when the track labeled
08:10Double un-mutes.
08:12(music playing)
09:14The repeating choruses at the end introduce an additional lead vocal like
09:18track, labeled LV ad-libs, in which the artist ad-libs around the basic vocal
09:23arrangement.
09:24At this point in the song, this mix is pretty much as full and crowded as
09:28it ever gets.
09:29And to help that ad-lib vocal keep up, we add some supportive echoes so these
09:34strong melodies swirl and soar.
09:37(music playing)
09:53That bed of supportive echoes lives on the aux send labeled SuportEcho.
09:58It's based on this simple stereo delay, a quarter note on the left and a
10:02half note on the right.
10:04Feedback makes them repeat and fade.
10:07The low-pass filter pushes them back a little into the mix.
10:10(music playing)
10:22The same supportive echo helps out these high harmonies, so the last chorus is
10:26rich and complicated.
10:28(music playing)
10:55Have you heard the bridge in this tune?
10:57(music playing)
11:09This layered harmony vocal section on the track labeled BGV Bridge gets some
11:14flanging, courtesy of this plug-in.
11:16And it sonically helps set off this section of the tune from the choruses
11:20on either side.
11:21(music playing)
11:32There's really nothing quite like flanging.
11:34Let's compare the sound of these vocals with and without flanging.
11:37Watch as I bypass the effect.
11:39(music playing)
12:01That gives you a good sense of most of the delay effects on the various vocal
12:04elements in this arrangement.
12:05While we're at the bridge, let's check out the groove-based delay effect on the
12:09acoustic guitar on the track labeled AGT Strum.
12:13(music playing)
12:23The guitar track is the simpler part.
12:25This rhythmic echo comes from four well-chosen delay settings in this 6-tap
12:29delay inserted on the aux input labeled GroveEcho.
12:33Here's the guitar part without the delay.
12:35(music playing)
12:41Okay, I admit it has slap echo, but we're talking about groove echo right now.
12:45There are so many effects we can get from delay.
12:48The pattern of delays for this groove echo is revealed by kicking the effect
12:51with just the first acoustic guitar strum.
12:54(music playing)
12:58An important added touch is that these echoes get flanged by this effect.
13:03The flanging softens the echoes so that the actual guitar track cuts
13:06through more strongly.
13:07I'm just trying to add some excitement to the bridge, but don't want to
13:10undermine the core performance this guitar has created.
13:13Let's hear it in the context of the full mix.
13:15I'll give you four bars without the flange on the rhythmic echo and then
13:18four bars with.
13:20You'll hear a slight change hopefully for the better.
13:23(music playing)
13:43That same groove echo sounds nice on the simple guitar part that follows.
13:47The alternation between two notes that happens on the chorus is right after
13:50the bridge.
13:51(music playing)
14:04Even though I'm using the same delay plug-in here as I did for those
14:07more powerful strums of the acoustic in the bridge, the intent here is
14:11not to enhance the groove.
14:13When the same pattern of delays pedals softly underneath the simpler guitar
14:17part, it serves more of a support function decorating the guitar with
14:21interesting ear-pleasing pulses.
14:24Other delays linger in the mix.
14:26There's very long delay on the synth line that we've lovingly labeled ooze.
14:30(music playing)
14:46That long delay simply adds complexity to a simple part.
14:49It's surprising at first that such a long echo would work, but it simply lingers
14:54ghostly at low level, adding motion and harmonic complexity.
14:58We heard earlier that there was a bit of slap echo on the acoustic guitar.
15:01There is also a slap on the Rhodes keyboard.
15:04The motivation here was to highlight the vintage of the instrument.
15:07The Rhodes is a keyboard from the 70s, so I gave it a 70's sounding tape delay,
15:11it has no other more important motivation than that.
15:14It's a simple, small, easy-to-ignore detail.
15:17(music playing)
15:22Delay-based effects pervade most pop mixes from flange to chorus to echo, from
15:27front and center to background, from loud to soft.
15:30We embellish the tracks we're given to make the most of the three-and-a-half
15:34minutes we might have with the listener whenever we pull them into our mix.
15:37(music playing)
Collapse this transcript
Course summary and goodbye
00:00A single delay processor, tape, outboard, or plug-in offers a broad range of
00:05audio opportunities representing a nearly infinite number of sound qualities
00:09to be explored.
00:11Short delays create that family of effects called comb filtering and flanging.
00:15Medium delays lead to doubling, chorusing, spreading, and thickening.
00:19And long delays lead to echoes; echoes for emphasis, support, groove,
00:24and slap back.
00:26Making sound recordings is a wonderfully open-ended creative process, but there
00:30is the risk especially if you're new to this craft, that at any given moment, you
00:34may not be sure what your next step should be.
00:37Maybe like me, you've been in this situation.
00:40You push up the faders and you wonder what to do.
00:42There are too many possibilities and you have so many ideas.
00:46You wonder, where do I start?
00:49So let's rule something out.
00:50You should never add delay to a track simply because you think it needs delay.
00:54That's too vague.
00:55Delay can do so many different things to a track.
00:58Instead, you should try to have a clearly defined sonic target in mind, a
01:03mix strategy.
01:04Once you've become familiar with the sound of a groove enhancing echo, a
01:08shimmering chorus, a radical comb filter, and the many other delay-based effects
01:13we've explored in this course, you will have access to a functional sonic
01:17vocabulary that can inform and inspire you.
01:21Knowing more instinctively when to reach for delay and what parameter settings
01:24you might need can help you stay oriented towards the production goal and not
01:28get bogged down in the effects devices themselves.
01:32When you know, in your mind's ear, what your track could sound like, you're able
01:36to bring it to life using the techniques we've explored throughout this course.
01:41Separating long delays from medium delays from short delays, and knowing what can
01:46be accomplished with each, gives you a sharper production focus.
01:49It can help you get to work more efficiently, and more importantly free you
01:53up creatively.
01:54I'm certain this leads to better sounding mixes.
01:57Thanks for watching Foundations of Audio:
02:00Delay and Modulation.
02:01If you like this way of thinking, come visit me at recordingology.com.
02:06And be sure to check out the other Foundations of Audio courses here
02:10at lynda.com.
Collapse this transcript


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