Very cool - can’t wait to try it. I made an impulse tracker clone for MIDI years ago that also uses SDL, though a mix of C and C++. It has been picked back up for dev again recently and we’re making good progress. https://github.com/m6502/ztrackerprime

The world could use more trackers. I’m really hoping the upcoming ableton live extension api will allow for direct access to the piano roll. I suspect many people include myself will use it to make tracker interfaces for ableton.

Renoise Redux is already shipping a feature complete tracker you can easily run in Ableton or Bitwig.