ONE: An Instrument for Whole Songs

Write a whole song in the browser: eight synthesized voices in one room, a drum machine, chords and scales, song sections and a phrase editor, with LFOs and filters on a master bus. Play it from a MIDI keyboard, save it in the browser, and export WAV, MIDI or JSON. One clock, one audio graph, no samples. Runs offline.

Audio Before you run it: plays sound, can save files to your device, saves progress in this browser.

For games or crowded controls, open the demo in a new tab for the most room.

• Web Audio
• Synth
• MIDI
• DSP
• Audio UI