Sound

Things that make noise in the browser. No plugins, no downloads — just the Web Audio and Web MIDI APIs.

• MIDI keyboard

  A playable keyboard with the full General MIDI instrument set, a drum kit, and an effects rack. Works with mouse, touch, your computer keys, or a connected MIDI device.

• Classical music player

  Public-domain classical works — Beethoven symphonies plus keyboard pieces by Bach, Mozart, Chopin, Debussy and more — played as MIDI through a real soundfont, with a piano-roll visualisation and a flip-to-live-notation view for the keyboard pieces.

• Beat maker

  A 16-step drum machine with synthesised kick, snare, clap, hats, toms and cowbell, plus tempo, swing and per-track controls. No samples — every sound is generated live with Web Audio.