Mapping "FM-from-B"

i did not look into your patches before.

you already have a slide~ in there which would have been my next recommendation

retune~ has its own "correction" feature so we can skip that stuff, too.

yes, there. scaling and distortion is the last step. the ftom~ object is a bit weird, it requires a float argument to output non-truncated signal values, like the max original does, too.

because of the way midi works (key 1-127 == 8.1-12500 hertz) you can often start such calculations with these factory objects. no idea if you also require to [clip~ 0. 1.] the range to perfection, but i would do.

some more ideas, just ignore me if it does not apply/if i misunderstood.

you seem to only use the center frequency here. it is more common to first in line use the amplitude envelope of B in order to FM A with that.

however, since you can look at traditional 2-sines-FM as having two parameters, the modulation amount and the freqeuency of the modulation oscillator, you could also make use of 2 control signals, the pitch and the amplitude envelope derived of B.

this gives you alltogether 4 different methods how to do B FM A. :)