Hi all,
I made a small app to serve as a live backing drummer. It’s controllable with touch/clicks or MIDI CC, like arrangers and the beatbuddy pedal, and works nicely on my pisound setup 
I’m looking for feedbacks and bugs, and even contributions for those interested!
The compiled version is at: https://github.com/paulfd/rhythmbox/releases
You’ll need beat description files, as well as an external generator or AVLinux sfz drums (other banks are not working well with the sfz library I included). I tried to explain everything in the repository readme!
Thanks, and have a nice day !