@zep I was recently trying to make a dynamic soundtrack with Picotron but found it to be likely impossible. Ideally I'd like to switch between two tracks and have them sync up (if you're on beat 3 of measure 2 of track A, it should switch to beat 3 of measure 2 of track B). However, music() has no parameter to specify where to start a track. Since sfx() has an optional offset parameter, I can't imagine it would be hard to add, and it would help a lot with creating dynamic soundtracks or other things like pausing music and resuming at a specific point.

Edit: Alternatively, a good approach for creating dynamic soundtracks would be temporarily muting channels. Track A could be made on the first four channels, and Track B on the last four. Then, by changing which channels are muted, you could effectively switch between tracks. I don't know how this could be implemented, though.