mmckegg/soundbank-reverb

Simple Web Audio API based reverb effect.

soundbank-reverb

Simple Web Audio API based reverb effect.

Based on https://github.com/web-audio-components/simple-reverb by Nick Thompson.

Intended for use as a processor in soundbank, but it is compatible with any Web Audio API AudioNode set up.

Install via npm

$ npm install soundbank-reverb

API

var Reverb = require('soundbank-reverb')

var reverb = Reverb(audioContext)

Pass an instance of AudioContext to the constructor to create an AudioNode.

reverb.wet AudioParam

reverb.dry AudioParam

reverb.cutoff AudioParam

Defaults to 20000.

reverb.filterType (get/set)

Defaults to "lowpass".

Can be any of the filters types specified by BiquadFilterNode

reverb.time (get/set)

Impulse time in seconds. Defaults to 3.

reverb.decay (get/set)

reverb.reverse (get/set)

true or false. Defaults to false.

Example

var Reverb = require('soundbank-reverb')

var audioContext = new AudioContext()

var reverb = Reverb(audioContext)
reverb.connect(audioContext.destination)

reverb.time = 1 //seconds
reverb.wet.value = 0.8
reverb.dry.value = 1

reverb.filterType = 'lowpass'
reverb.cutoff.value = 4000 //Hz

setInterval(function(){
  var source = audioContext.createOscillator()
  source.type = 'sawtooth'
  source.connect(reverb)
  source.start()
  source.stop(audioContext.currentTime + 0.5)
}, 2000)

soundbank-reverb's Issues

Problems with MS Edge

It looks like this is causing distorted/choppy output in MS Edge, which has a sampleRate of 192000. The other browsers I've been testing seem to use 44100, which is fine.

Any ideas?

I can put together a test case if need be.

Sometimes Turns off

I've noticed sometimes it goes into a 'mute' state where, it seems like, it's no longer firing the next() event. Any ideas? Similarly, is there a way we could manually call .tick() on the reverb node or something, for games that have a requestAnimationFrame loop and don't want to get into managing timeouts?

Sorry I don't have a repo for testing yet... I'm trying to wrap my head around how this reverb effect actually works.

cache impulses and generate in prime state