docs - what is it?

it's for playing a song on piano and drums. and practicing.
show notes in a "pianoroll" format that's a little bit fancy.
you practice the piano parts and the bass, drums and vocals sync to your tempo.
NOT a daw!! We're here to get a take, not to mix down.
getting a song into your head and fingers is the aim.

Ok ok ok screenshots... Here's Clair de Lune:

Hmmm, that looks kinda easy, right? That's cuz easy mode is on.
The real song looks like this:

Ok ok ok let's get this thing installed and off the ground...