Lilt is a small instrument that runs in a browser tab. You draw a line and it plays: left to right is time, up and down is pitch. A few lines together make a harmony that loops every eight beats.
Try it
It is playable here, with nothing to install and no account: https://kadenball.github.io/lilt/
Pick a voice (Glass, Warm, or Pluck), change the scale and tempo, and export two loops as a WAV file. There are no samples; the sound is synthesized on your computer.
What I’d like from you
Play for two minutes and tell me one thing you tried to do that it would not let you do. That is the most useful feedback right now, and it needs no coding agent.
If you want to build something: drawings disappear when the page closes. Saving a drawing, and sharing a melody as a link, are the first open tasks in the plan.