Ruby script that slices an audio file into N-frequency bands using SoX (http://sox.sourceforge.net/) - not sure if the high/low algorithm I selected is sound audio engineering - I'm using "sinc" [sinc kaiser-windowed low-pass, high-pass, band-pass] - The frequency progressing is 32,64,128,256,512,1024,2048,etc. - For slice N, the window is between N-1 and N+1. So it isn't really centered on N. - see http://sox.sourceforge.net/sox.html for a description of the sinc algorithm