I want to replicate a specific model of e-piano on my MIDI keyboard. To do this, I must send white keys to one synth application, and black keys to shift down half a tone and send to another synth.
I have no idea how to accomplish it with JACK. Do I need to write specific app for this or is there anything already? Can somebody point me at where to start reading? Where to ask?


Splitting keys by color is so unusual that there is no software that can do this automatically.

You have to do some programming yourself, but there are MIDI filter platforms that make it easer, such as mididings or midish.


You should be able to do this via GUI using QMIDIRoute but you'll have to set up a rule for at least each black key.

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