>> That's so arbitrary The mapping seems particularly arbitrary to me. After all, an octave more = properly has 7 or 12 notes, not 8. The natural thing to do would be to express PI in base 7 or base 12, and th= en map it onto the appropriate scale. Or to divide the octave into 10 tone= s. Though restricting the piece to one octave seems arbitrary as well. Meh. I've played stranger pieces. (5th notes. gah!) BillW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .