synth

Polyphonic synthesizer with analog-like features based on native Web Audio API nodes.

About

Web Audio API provides all components needed to make a fully-featured Polysynth, but the components are relatively low level, and requires a lot of work to get basic sounds. By putting these together, modelling the behavior of familiar analog synthesizers, we can easily recreate a wide range of sounds with just a few controls.

• Two oscillators
  • Saw, Sine, and Square waveforms with PWM
  • Random phase
  • Fine tuning
  • Unison with stereo panning and detune
  • Poly, Mono, and Legato mode with glide
• Per note filter with cutoff, resonance, and Q-value
• ADSR controls for amplitude and filter
  • Adjustable envelope shape
• Keyboard tracking filter

Installation

npm install @c-wiren/synth

Examples

Play middle C for one second:

import { Synth } from "@c-wiren/synth";

const audioCtx = new window.AudioContext();
let synth = new Synth(audioCtx);
synth.noteOn(60, 1);
window.setTimeout(() => {
  synth.noteOff(60);
}, 1000);

Export and apply a preset:

let preset = synth.exportPreset();
preset.oscillators[0].waveform = Waveform.Sawtooth;
synth.applyPreset(preset);