61 keys, 5 octaves — play and record straight to a WAV file
This is a 61-key, 5-octave (C2–C7) virtual synthesizer built on the Web Audio API. Play it with your mouse, with touch (including multiple fingers at once for chords), or with your computer keyboard — the two rows Z through M and Q through U play two consecutive octaves around middle C. Switch between sine, triangle, sawtooth and square waveforms at any time, and the on-screen keyboard scrolls horizontally so all 61 keys stay reachable on narrow phone screens.
Press Record and everything you play is captured sample-by-sample as it's synthesized — not by recording your speakers, but by tapping the actual audio graph — so the result is a clean, silence-free capture with no system noise. Press Stop and a standard 16-bit PCM .wav file is assembled and downloaded immediately.
Everything — synthesis, playback and WAV encoding — happens locally in your browser. Nothing is uploaded to any server, and no account or install is required.