I've just made some progress on the drum machine I was writing for the Pepper.
It now has polyphonic midi support, CV input for the reverb, parameter controls for reverb with the knobs, multiple instrument banks using the buttons(only one set up so far) and volume control for the drums.
It's WIP so pardon the state of the code, but I'll improve that later.
The first four inputs are CV control for the reverb, the next four are triggers for the drums.
First four outputs are Midi->CV out, next four are Midi->Trigger out.
Top four knobs control drum volumes, bottom four reverb parameters.
Audio input is passed through the reverb and mixed with the drums.
Buttons flips through the instruments set up in an array in the code.
https://github.com/hallvardkristiansen/Bela-pepper-drum-machine
