Orchestre JS

Initialization

Initialize an orchestra by providing your song's BPM, then start adding players. Each player represents a musical layer that will play in loop. It needs a name, an audio file, and a length in beat.

const orchestre = new Orchestre(120);
await orchestre.addPlayers([
  {name: 'bass', url: './assets/bass.ogg', length: 16, absolute: true},
  {name: 'melody', url: './assets/melody.ogg', length: 8, absolute: false},
  // etc...
])
orchestre.start();

Play

Activate and deactivate your players to make them play in sync.
There are two kinds of players: absolute and relative. Play around with them to hear the difference!

Absolute

Will always stay on the same beats

Relative

Will play on the first beat when activated

orchestre.play('bass');

orchestre.stop('bass');

// alternate between play and stop
orchestre.toggle('bass');

Options

Orchestre-JS comes with several options to trigger audio layers in different ways.

Play or stop immediately with a fade in and fade out

Play only once

Schedule player on next 2 bars

(Scheduled…)

Stop loop but let the track end

orchestre.toggle('synth', {
  now: true,
  fade: 1.2
});

orchestre.play('jingle', {
  once: true
});

orchestre.schedule("shamisen", 8, "play", {
  absolute: true,
});

orchestre.stop("shamisen", {
  keep: true,
});

Events

Subscribe to events to trigger actions on beat.

EIGHT!

Called every two beats

await orchestre.wait(8);

let listenerId = orchestre.addListener(() => { playAnimation() }, 2);