MOTM

>Even conventional music could use multiple scales at the same time - 
>here's an example off the top of my head:
>
>A jazz/blues patch:
>A sequencer using a chromatic scale for a walking baseline;
>Another sequencer using a major scale to comp with arpeggiated chords;
>A S&H using a pentatonic scale to "solo" on top
>
>-Chris

Yes, that's exactly what I do. They're all in compatible key, but 
they don't all quantize to the same subset of notes from the 
12-notes-per-octave.