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Modulation refers to an external signal that varies a signal of an instrument or a vocal and volume, timing or pitch. This includes effects like Chorus, Flanging and Phasing, which are pretty standard mixing tools, to trim along vibrato, which you use mostly on Guitars and Electric Pianos. While all modulation effects certainly don't sound the same, not many mixers know the difference between them. In this video, I am going to demonstrate the differences between different types of modulation effects. So there are three main types of modulation effects that you usually use during a mix down.
One is Phase Shift, one is Chorus, the other one is Flange. Chorus, is the most popular of all three, but let's start with the Flanger. First of all let's take a listen to it. (Music playing) Flanger is a pretty dramatic effect and it was first derived in 60s by the playback of a song on two different tape recorders at the same time. By slowing one of the machines down by placing your finger on the tape flange, it became known as Flanging.
Flanging is fairly dramatic, so it isn't used all that often. Sometimes it's used across the entire mix. And occasionally, it's used on individual instruments like this Guitar or sometimes with keyboards, electronic keyboards especially. A modulation effect is used even more as a chorus. Let's look at that for a second. I will bring up chorus have a listen. (Music playing) It's a nice, gentle effect that expands the sound of the instrument across the stereo channels so it's stereo rises something that's kind of mono to begin with, which is very nice.
Both the chorus and flange effect is a modular delay that's mix back into the original signal. The difference between the chorus and the flange is that the, flange has a very much shorter delay time. It's usually less than one second or so. Phasers are somewhat less dramatic effects and they aren't use quite as much. Let's take a listen. (Music playing) You just don't hear this effect all that much and when you hear it, it's usually on an electric piano, where it tends to work little bit better than another instruments.
So those were those different kinds of modulation effects. Chorus and flange comes from a modulated delay. That's mixed back into the original signal, with the chorus having a longer delay than a flanger, while Phasers are a less dramatic effect and not used as much.
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