Web Audio API vibrato effect.

Install the package with NPM:

$ npm install vibrato

The package exposes a function that accepts an AudioContext as the first argument, and an AudioParam as the second. Optionally, an object specifying rate and depth can also be provided as the third argument. When called, the function will apply a vibrato effect to the AudioParam.

Example:

import vibrato from "vibrato";

let context = new (window.AudioContext || window.webkitAudioContext)();
let oscillator = context.createOscillator();
oscillator.connect(context.destination);
oscillator.start();

vibrato(context, oscillator.frequency, { rate: 4, depth: 16 });

Furthermore, as a convenient shorthand, you can pass in an OscillatorNode directly:

vibrato(oscillator, { rate: 4, depth: 16 });