Nice work! Nice that you also implemented an MPC-style swing. How do you generate samples? Are they also procedurally generated or are they chosen from a fixed set of samples? I suppose you're not planning to release any sources for this...
> What is Mpc style swing?
You can get an explanation directly from the MPC 3000 manual [0].
> Does that mean you can push the swing beats all the way to the next time slice?
At least the original MPC series couldn't move the note to the next time slice. The maximum setting was 75%. That made the first note of each pair of 1/8 or 1/16 notes three times the length of the second note.
[0]: <https://www.manualslib.com/manual/207365/Akai-Mpc-3000.html?...>
I found some repositories related to this on OP's github page <https://github.com/chr15m?tab=repositories>
This is the repository for the webaudio functions <https://github.com/chr15m/cljs-dopeloop>