A soundfont loader/player to play MIDI sounds using WebAudio API.
It loads Benjamin Gleitzman's package of pre-rendered sound fonts by default with no server setup. Just a few lines of javascript:
Soundfont.instrument(new AudioContext(), 'acoustic_grand_piano').then(function (piano) {
piano.play('C4')
})It is a much simpler and lightweight replacement for MIDI.js soundfont loader (MIDI.js is much bigger, capable of play midi files, for example, but it weights an order of magnitude more).
- Load soundfont files in MIDI.js format or json format.
- Unlimited poliphony (and stop all sounds with a single function call)
- Use midi note numbers. Accepts decimal points to detune.
- Easily connect to a Web MIDI API
MidiInput - Schedule a list of notes
It uses audio-loader to load soundfont files and sample-player to play the sounds.
Via npm: npm install --save soundfont-player
Or download the minified code and include it in your html:
<script src="soundfont-player.js"></script>
<script>
Soundfont.instrument(new AudioContext(), 'marimba').then(function (marimba) {
})
</script>The soundfont loader
Out of the box are two Soundfonts available: MusyngKite and FluidR3_GM (MusyngKite by default: has more quality, but also weights more). You can load them with instrument function:
Soundfont.instrument(ac, 'clavinet').then(function (clavinet) {
clavinet.play('C4')
})
// or use FluidR3_GM
Soundfont.instrument(ac, 'clavinet', { soundfont: 'FluidR3_GM' }).then(function (clavinet) {
clavinet.play('C4')
})You can load your own Soundfont files passing the .js path or url:
Soundfont.instrument(ac, '/soundfonts/clavinet-mp3.js').then(...)
// or
Soundfont.instrument(ac, 'clavinet-mp3.js', { from: 'server.com/soundfonts/' })The soundfont player
Once you have an instrument you can:
// The first step is always create an instrument:
Soundfont.instrument(ac, 'clavinet').then(function (clavinet) {
// Then you can play a note using names or midi numbers:
clavinet.play('C4')
clavinet.play(69)
// float point midi numbers are accepted (and notes are detuned):
clavinet.play(60.5) // => 500 cents over C4
// you can stop all playing notes
clavinet.stop()
// or stop only one
clavinet.play('C4').stop(ac.currentTime + 0.5)
// or pass a duration argument to `play`
clavinet.play('C4', ac.currentTime, { duration: 0.5})
// You can connect the instrument to a midi input:
window.navigator.requestMIDIAccess().then(function (midiAccess) {
midiAccess.inputs.forEach(function (midiInput) {
clavinet.listenToMidi(midiInput)
})
})
// Or schedule events at a given time
clavinet.schedule(ac.currentTime + 5, [ { time: 0, note: 60}, { time: 0.5, note: 61}, ...])
})< 0.9.x users: The API in the 0.9.x releases has been changed and some features are going to be removed (like oscillators). While 0.9.0 adds warnings to the deprecated API, the 1.0.0 will remove the support.
Load a soundfont instrument. It returns a promise that resolves to a instrument object.
The instrument object returned by the promise has the following properties:
- name: the instrument name
- play: A function to play notes from the buffer with the signature
play(note, time, duration, options)
The valid options are:
format: can be 'mp3' or 'ogg'soundfont: can be 'FluidR3_GM' or 'MusyngKite'nameToUrl: a function to convert from instrument names to URLdestination: by default Soundfont uses theaudioContext.destinationbut you can override it.gain: the gain (volume) of the player (1 by default)attack: the attack time of the amplitude envelopedecay: the decay time of the amplitude envelopesustain: the sustain gain value of the amplitude enveloperelease: the release time of the amplitude envelopeadsr: the amplitude envelope as array of[attack, decay, sustain, release]. It overrides other options.loop: set to true to loop audio buffersnotes: an array of the notes to decode. It can be an array of strings with note names or an array of numbers with midi note numbers. This is a performance option: since decoding mp3 is a cpu intensive process, you can limit limit the number of notes you want and reduce the time to load the instrument.
| Param | Type | Description |
|---|---|---|
| ac | AudioContext |
the audio context |
| name | String |
the instrument name. For example: 'acoustic_grand_piano' |
| options | Object |
(Optional) the same options as Soundfont.loadBuffers |
Example
var Soundfont = require('soundfont-player')
var ac = new AudioContext()
Soundfont.instrument(ac, 'marimba', { soundfont: 'MusyngKite' }).then(function (marimba) {
marimba.play('C4')
})The player object returned by the promise has the following functions:
An alias for player.start
Start a sample buffer. The returned object has a function stop(when) to stop the sound.
Valid options are:
gain: float between 0 to 1attack: the attack time of the amplitude envelopedecay: the decay time of the amplitude envelopesustain: the sustain gain value of the amplitude enveloperelease: the release time of the amplitude envelopeadsr: an array of[attack, decay, sustain, release]. Overrides other parameters.duration: set the playing duration in seconds of the buffer(s)loop: set to true to loop the audio buffer
Stop some or all samples
player.on(event, callback) ⇒ player
Adds a listener of an event
Connect the player to a destination node
Schedule a list of events to be played at specific time.
player.listenToMidi(input, options) ⇒ player
Connect a player to a midi input
See soundfont-player for more information.
Given an instrument name returns a URL to to the Benjamin Gleitzman's package of pre-rendered sound fonts
Returns: String - the Soundfont file url
| Param | Type | Description |
|---|---|---|
| name | String |
instrument name |
| soundfont | String |
(Optional) 'FluidR3_GM' or 'MusyngKite' ('MusyngKite' by default) |
| format | String |
(Optional) Can be 'mp3' or 'ogg' (mp3 by default) |
Example
var Soundfont = require('soundfont-player')
Soundfont.nameToUrl('marimba', null, 'ogg') // => http://gleitz.github.io/midi-js-soundfonts/FluidR3_GM/marimba-ogg.js## Run the tests, examples and build the library distribution file
First clone this repo and install dependencies: npm i
To run tests use npm: npm test
The dist folder contains ready to use file for browser. You can use the dist file from the repo, but if you want to build you own run: npm run dist
To run the html example start a local http server. For example:
npm install -g http-server
http-serverAnd open http://localhost:8080/examples
To run pure javascript examples npm install -g beefy then beefy examples/marimba.js and navigate to http://localhost:9966/
By default it loads Benjamin Gleitzman's pre-rendered SoundFonts.
Instrument names
You can download the names of the instruments as a .json file:
Or require them:
var fluidNames = require('soundfont-player/names/fuildR3.json')
var musyngNames = require('soundfont-player/names/musyngkite.json')- SoundFont technical specification: http://freepats.zenvoid.org/sf2/sfspec24.pdf
MIT License
