Behold this super cool emulation of Laurie Spiegel's famous 1986 "Music Mouse" software:
https://teropa.info/musicmouse/Move your mouse around and it triggers chords
You can switch to arpeggios, or my favorite -- "improvise", where the software takes the cluster of notes you're triggering and randomly plays 'em
Some thoughts from me about Magic Mouse, on my blog (item 3):
https://clivethompson.medium.com/chucks-turn-hellabytes-become-official-and-the-library-of-mistakes-f19ffe0adbfd
