@Enkerli PureData is amazing. Have considered making stand-alone boxes with a single complex musical function using linux and Pd. It works on R-Pi.
E.g. MIDI transposer, modulating one MIDI channel by another monophonic channel.

@Stringbender Same here. My hardware skills are pretty meh but part of my #RaspberryPi dream is about a small #soundmodule which would produce chords from incoming notes. My two favourite chorder/harmonizer MIDI effects are about selecting chords by algorithm and “rotating chords” #MichaelBreckerEffect. Those can really work in #PureData.
Any insight as to how to go about this?

@Enkerli Wonder if you ever tried Usine Hollyhock. Strong audio and midi processing and patching facilities, and unusual, effective UI. Covers most of same ground as PureData, at a higher level. Not R-P though - higher spec PC and Mac. Steep learning curve - hard to appreciate what it can do until you know it well.