Is there any app that can transpose one midi signal by another?
[midi source A note value] + [midi source B note value ] = [output note value]
In practice, it’d probably have to do two further things:
- prioritise the note on/off values of one, the other, or combination of both, according to a setting (and sampling and holding the last note value of each input)
- if the two notes are adding, then they’ll end up higher than either, so it’d be nice to bring them back down
I can’t think of any app that allows this to occur. I don’t think it can be done in midi flow, or timid stuff, or midi designer, or, well, anything.