soundbank-delay

Basic delay processor AudioNode with feedback, filter and wet/dry AudioParams.

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

Install

$ npm install soundbank-delay

API

var Delay = require('soundbank-delay')

Delay(audioContext)

Create and return an AudioNode instance.

node.sync (get/set)

When true, the delay rate is multiplied by 60 / node.tempo to allow beat sync.

node.time (AudioParam)

Time the feedback should be delayed by. Maximum value is 4 seconds.

If node.sync is true, this is the number or fraction of beats the feedback should be delayed by.

node.wet (AudioParam)

node.dry (AudioParam)

node.cutoff (AudioParam)

reverb.filterType (get/set)

Defaults to "lowpass".

Can be any of the filters types specified by BiquadFilterNode

node.feedback (AudioParam)

Example

var Delay = require('soundbank-delay')
 
var audioContext = new AudioContext()
 
var delay = Delay(audioContext)
delay.connect(audioContext.destination)
 
delay.time.value = 0.2 //seconds
delay.wet.value = 0.8
delay.dry.value = 1
delay.cutoff.value = 400 //Hz
delay.feedback.value = 0.6
 
setInterval(function(){
  var source = audioContext.createOscillator()
  source.connect(delay)
  source.start()
  source.stop(audioContext.currentTime + 0.5)
}, 2000)