Polyphony while Key Jazzing

[dotmatrixgirl]

Feature request to input multiple notes while key jazz is enabled without notes cutting out.

Having polyphony while key jazzing would be super nice, for previewing how chords sound. rn it adds a note off on a new keypress on both keyboard and midi keyboard. Have to resort to arps to test out sounds.

[jangler]

Select multiple tracks to play chords. This works for keyjazzing and note entry.

For convenience it might be still a good idea to let more tracks be pulled in automatically in keyjazz mode, but currently I'm still thinking about the implementation and pros/cons of that.