implement cps in scheduler

[felixroos]

partly fixes #470

• refactored the scheduler to use cps
• cps is now passed to hap onTrigger
• added setcps / setCps methods

still missing:

• patternable cps: how should this work? should the tempo have an effect on the cps pattern too?
• ui controls: basic version already implemented, but now commented out because it's not clear how the tempo is shared, as it is not part of the code

I'd say having the basic cps functionality working is already a good first step, the missing things can be addressed in a future PR

[yaxu]

oh great !!

• patternable cps: how should this work? should the tempo have an effect on the cps pattern too?

In tidal it's just another control, so you could do e.g. s("bd sd").cps("<0.75 1.5>") or separately cps(saw.range(1,2).slow(4).segment(32)).

This gets a bit complicated for the scheduler. If it's running at 20Hz, it queries the pattern for the right slice, but has to deal with changes in cps during that slice which means the slice is then either too big or too small..

In tidal setcps is just an alias for once . cps

I'd say having the basic cps functionality working is already a good first step, the missing things can be addressed in a future PR

agreed!