Representation of Sound

Computational Music Synthesis

Aliasing, Nyquist, and high sample rates for digital sound
This is in response to a lot of silliness around high sampling rates (24-bit, 192K) for audio. He mentions a lot of the terminology covered in the lecture notes.
Changing Phase of a square wave
Here you can see that when you change the phase of various harmonics in a square wave, but not their amplitude, the wave shape changes drastically but you can't hear any difference. Humans are largely insensitive to phase.