Sweet! Thanks for the follow up. I hope it's a straightforward fix!

Aside from that, nice work on the app! Looking forward to giving it another try.

ETA: a shameless plug, but since you may have an interest in this kind of thing - I built and published a free, online midi piano (and drum kit) available for anyone to use. It's pretty bare-bones and doesn't really explain itself, but in case you ever want to use it, check out https://midi-speaker.com/

works with midi input as well as keyboard and touch/mouse input. it only has the two sampled instruments, but it's great for a groove in a pinch!