howler-plugin-effect-chain

Adds an audio effect chain to Howler. Suitable as bridge between Howler and web audio libraries such as Tuna.

It works by injecting a chain of nodes between Sounds and the Howler.masterGain:

Sound._node -> Howler._effectChain -> [Added effects] -> Howler._effectChainOut -> Howler.masterGain

Installation

Via npm

First, install it.

npm i -S howler-plugin-effect-chain

Now import it.

// ES6 imports
import { Howler, Howl } from 'howler'
import 'howler-plugin-effect-chain'
 
// CommonJS imports
var howler = require('howler')
require('howler-plugin-effect-chain')

Via script tag

Save src/index.js as howler-plugin-effect-chain.js (or whatever you want to call it) and add a <script> tag after the core Howler library.

<script src="howler.min.js"></script>
<script src="howler-plugin-effect-chain.js"></script>

API

Howler.addEffect(effect)

Adds an effect to the effect chain. The effect object must function like an AudioNode, exposing a connect and disconnect method.

Here's an example using the Tuna library.

import { Howler } from 'howler'
import Tuna from 'tunajs'
 
const tuna = new Tuna(Howler.ctx)
const chorus = new tuna.Chorus({})
 
Howler.addEffect(chorus)

Howler.removeEffect(effect)

Removes an effect from the effect chain. The passed effect object must have been previously added using Howler.addEffect(effect).

Here's an example removing the chorus from the previous example.

Howler.removeEffect(chorus)