But the idea reported by one of you was to be able to use a single modulator to control multiple bands placed on harmonics of the fundamental. Despite it is easy to do that with separate modulators, it's not that simple to do that with just a single modulator. And here's how
.For every transpose you will need a coefficient, use this formula:
x = pitchshift / 9.96578428466
(9.96578428466 is log2(20000)-log2(20), thus log frequency interval size)
pitchshift is already logarithmic, so basically it's in octaves, for semitones it's like this:
pitchshift = octaves + semitones / 12
So for example, 1st harmonic is one octave above, so
x = 1 / 9.96578428466 = about 0.101, thus 10.1%
2nd harmonic is one octave and fifth (7 semitones), so
x = (1 + 7/12) / 9.96578428466 = about 0.159, thus 15.9%
You can easily get the other harmonics
The graph should then look like this:
The idea is, that the left node is moved by "x" upwards, and the right node by "x" leftwards. So it effectively moves the range without distorting it. This image shows the first harmonic with x=10.1%
Ok, enough math for today
. Good enough?