Hi All! My first post, I’m new 
I was thinking how I might build something like this in Anvil?
or
https://learningmusic.ableton.com/make-beats/make-beats.html
My initial thoughts were to use midi JavaScript libraries to load midi files and play them, and use the sequencing info (events) to change properties on a grid component. I imagine I’d need to do quite a bit with a custom component using the grid component. Not quite sure how to do a playback head just yet : - )
It doesn’t seem trivial, but doable, but I thought I’d throw this use case out there to hopefully hear some thoughts as to possible architectures for something like this.
Thx!