[JKCalhoun]

> Rougly (sic) speaking, the radial coordinate corresponds to time, the angular coordinate corresponds to frequency and color correponds (sic) to pitch or musical note.

Confused since pitch and frequency in my mind are the same thing. I googled around and there is precious little about this that I could find to enlighten me ... uses a pair of FFT's or some such.

[nitrogen]

It's probably note within octave, so 55, 110, 220, 440, 880, etc. would all get colored as "A".

[gbh444g]

Yep, that's the idea.