Hello. I've been wondering....

When Banade lists a series of 'heterodyne' or comb tones elements
such as "3P, 2P+Q...", is the "3P" component by itelf a combination
(or 'multiplication') tone (say, 3x600 cps), which his syntax
implies, or is it always, in turn, part of a difference tone set (3P-
2q)?

And if multiplication is going on, so to speak, with the
3P 'multiplication' tone, then do two tones ever
produce 'multiplication' tones between them (pxQ), just as they
produce difference tones between them (p-q)?

I assume that the way intervals 'stack' up in a multiplicative
fashion to create chords (5/4 x 6/5 = 3/2) is unrelated to hearing
mechanisms and brain processing, and is a simple result of the
logarithmic nature of pitch?

thanks, Kelly