https://github.com/okaybenji/subpoly

a Web Audio subtractive, polyphonic synthesizer
https://github.com/okaybenji/subpoly

javascript synth synthesizer webaudio

Last synced: 28 days ago
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a Web Audio subtractive, polyphonic synthesizer

• Host: GitHub
• URL: https://github.com/okaybenji/subpoly
• Owner: okaybenji
• License: mit
• Created: 2015-09-30T13:37:30.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2016-12-10T15:53:43.000Z (almost 8 years ago)
• Last Synced: 2024-09-21T08:12:04.093Z (about 2 months ago)
• Topics: javascript, synth, synthesizer, webaudio
• Language: JavaScript
• Homepage:
• Size: 25.4 KB
• Stars: 19
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-javascript-audio - okaybenji/subpoly - small multi-voice (polyphonic) synth, define sounds as JS objects (MIDI instruments / Synths)

README

        
# subpoly

A Web Audio subtractive, polyphonic synthesizer. Just need one voice? Check out [submono](https://github.com/okaybenji/submono)!

### Create a synth.

```

var audioCtx = new AudioContext();

var synth = new Polysynth(audioCtx);

```

**Your new `synth` has an array of [submono](https://github.com/okaybenji/submono) `voices` attached.**

### Play a note.

`synth.voices[i].start();`

### Stop playing.

`synth.voices[i].stop();`

### Play all voices.

`synth.start();`

### Stop all notes.

`synth.stop();`

### Use methods to access a voice's pitch and waveform...

```

synth.voices[i].pitch(440);              // in hertz

console.log(synth.voices[i].waveform()); // 'sawtooth'

```

### ...get or set any other properties directly.

```

synth.voices[i].maxGain = 0.5; // out of 1

synth.voices[i].attack = 1.0;  // in seconds

```

### Use methods to set any property for all voices at once.

```

synth.maxGain(0.5);         // out of 1

synth.attack(1.0);          // in seconds

synth.pitch(440);           // in hertz

synth.waveform('sawtooth'); // or sine, triangle, square

```

### Set the stereo width.

`synth.width(1.0); // out of 1`

### Configure any or all the properties on initialization.

```

var config = {

  waveform: 'sawtooth', // or sine, triangle, square

  pitch: 440,           // in hertz

  maxGain: 0.5,         // out of 1

  attack: 0.1,          // in seconds

  decay: 0.0,           // in seconds

  sustain: 1.0,         // out of 1

  release: 0.8,         // in seconds

  stereoWidth: 0.5,     // out of 1

  numVoices: 5,         // unlimited

  cutoff: {

    maxFrequency: 7500, // in hertz

    attack: 0.1,        // in seconds

    decay: 2.5,         // in seconds

    sustain: 0.2        // 0-5; maxFrequency multiplied by this

  }

};

var synth = new Polysynth(audioCtx, config);

```

### Demo

[musical typing](http://okaybenji.github.io/web-synth/)