Matt shares that frequency and amplitude are two of the fundamental aspects of sound. Frequency, measured in Hertz (Hz), refers to how often the waveform moves up and down, and amplitude, referred to in decibels (dB), means how far it moves up and down. He explains that decibels are not units, but a way of expressing a ratio; however, they can be used as units of measurement if compared to a reference point like SPL (sound pressure level).
- Two of the most important aspects of sound…that can be measured using numbers…are frequency and amplitude.…Let's start with frequency.…The simplest possible type of sound,…called a Sine Wave, has only one frequency at a time.…We perceive that frequency as a pitch…on a spectrum from low to high.…While the terms frequency and pitch…are sometimes interchanged,…pitched usually has a more musical meaning…while frequency refers specifically to the measured rate…at which a sound wave fluctuates.…
That's different from the speed of sound.…As an analogy, imagine your at the beach…watching the waves hit the shore.…We could measure the speed of the waves,…which is how fast they move toward the beach…or we could measure the frequency of the waves,…which is how often a wave arrives.…For example, if a wave hits the shore every second,…the frequency is one wave per second.…We can compare the frequency of ocean waves…to the frequency of sound waves.…
We measure the pattern of high and low…air pressure fluctuations in cycles per second.…
The course starts with explanations of what sound really is and how we hear it, including discussions on frequency, amplitude, phase, and psychoacoustics. Matt explores analog audio signal path, explaining connections, gain staging, and metering. Next, he brings the audio signal into the digital domain, discussing analog to digital conversion, digital gain staging, file formats and compression, and dither.
Then the course digs into digital audio workstations (DAWs), explaining the concepts and misconceptions involved in digital recording systems. Matt describes how memory, CPU speed, and storage affect your DAW's performance, as well as how to manage computer resources and understand the plethora of file formats associated with digital recording. He follows with an overview of MIDI: how to generate, store, process, and communicate MIDI data. He wraps up with the audio processors that are often used for mixing in a DAW—including EQ, compressors, reverb, delay, and many others.
- What is sound?
- The three domains of sound: acoustic, analog, and digital
- The analog vs. digital signal paths
- Converting analog audio to digital
- Digital formats and data compression
- Understanding the five types of DAWs
- Recording performances with MIDI
- Mixing and processing audio with EQ, compression, and other effects
Skill Level Beginner
Music Production Secrets: Larry Crane on Recordingwith Larry Crane2h 21m Intermediate
Drum Setup and Mic'ing in the Studiowith Ryan Hewitt1h 14m Appropriate for all
1. Concepts of Sound
2. The Signal Path: Acoustic and Analog
3. The Signal Path: Digital
4. Digital Audio Workstations
6. Mixing and Processing Audio
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