Editable Music 🎶

This needs a bit of work: different tones, different instruments, different envelopes, better visualizations like that note progression(?).

Music by Tom MacWright & sorry for the bugs. I wonder if small perf-delays are causing issues here?

These formulas are editable! Ideas: delete note and E5 formula and play the chords, delete chords and play the notes only; alter patterns e.g. in E5, or uncomment C4 and setup a beat for it (calculang here so mind your brackets!).