I wrote mine also, integrating an Akai Fire, at https://music.gbraad.nl/meister as part of a tool to do live performances. This controls some of my remix tools, mixxx and vj tools too.

Edit: my usecase is more integrating different tools and devices, Bitwig, Electribe, mixxx, my mod/protracker remix tool, etc. I guess your usecase is more to generate music, less my thing, but possible. I just have a particular sequencer/tracker use. Generation happens in bitwig