AI FOR GOOD
Activity guide ↗

Choose one note per step

Select a note in each column. Select it again to leave a rest. Higher rows play higher notes. The highlighted column marks the current step.

Ready. Sound starts only when you press Play.

How it was made

Opus 5.5 wrote the synthesizer and scheduler. Sonnet 5.5 designed the activity and supplied the prepared note patterns. Codex built the controls and checked the result.

These sounds are synthesized locally from oscillators. No recording, microphone, samples, or live AI calls are used. Playback stops after 20 seconds or when you leave the page.