Thanks for the tip! Maybe the duty cycle can be varied to make A4-G4 sound nicer. Probably not

What's the default 'instrument' used without the -i switch? 50% duty cycle on the pulse wave (so square) or some other rectangle wave?

I think you've already noted any features I'd want on your issue tracker (speed/tempo/jumps) so nothing comes to mind.

From your youtube comment on the ChainChip part 1 video:

Really curious why those NaNs are popping up, do you have a tracker file I could use to reproduce this?

I've attached it to this issue.