wobbler

A WOBBLE SYNTHESIZER EFFECT!

BASIC WOBBLE: a lowpass filter, with the frequency being controlled by an LFO. NICE DUBSTEP: modulate the LFO speed/frequency on the beat!

EXAMPLE

var makeWobbles = require('wobbler')
var context = new (window.AudioContext || window.webkitAudioContext)()
var wobbler = makeWobbles(context)
var osc = context.createOscillator()
osc.connect(wobbler.input())
wobbler.connect(context.destination)
osc.start()
wobbler.start()

A key step to getting a good wub wub going is to radically alter the LFO frequency in time with the rhythm. Lets say you have set an interval at 120bpm (or thereabouts i know setInerval is not reliable, get off me):

window.setInterval(function(){
  // probably update the frequency of the oscillator here somewhere I guess, unless this is some of that "drone" music that I have been hearing so much about

  var freq = [0.25, 0.5, 0.75, 1, 2, 3, 5][~~(Math.random() * 7)]
  wobbler.lfo.frequency.setValueAtTime(freq, context.currentTime)
  // the wubbles are really wobbing now! 


  // the wobbler has a short 1.5 second delay built in, and if we mess with the delay time it will cause weird sounds to happen! that's awesome like skrillex! lets doo that too!
  if(Math.random() < 0.33){
    var time = [0.25, 0.5, 0.75, 1, 1.25][~~(Math.random() * 5 )]
    wobbler.delay.delayTime.setValueAtTime(time, context.currentTime)
  }

}, 500)

API

• keys() => Returns an array of string keys to audioNodes. ['lfo', 'lfoGain', 'filter', 'delay', 'volume', 'analyser']
• input() => returns the input node for the synth, so you can do like oscillator.connect(wobbler.input()).
• connect(destination) => Connects the output of the filter to a destination or other node.
• start() => Calls start() on the LFO.
• stop() => Calls stop() on the LFO. Shhhhhh. (maybe it should disconnect itself too? "cleanup()"? NOMEMORYLEAKS2016)
• export() => Returns JSON respresentation of the instrument. For easily saving settings between browser sessions.
• import(data) => Loads JSON data, or use default values if no data is passed.