scratchfoundation/scratch-audio
1
0
Fork 0
mirror of https://github.com/scratchfoundation/scratch-audio.git synced 2024-12-22 14:02:29 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

cleanup

Browse source
This commit is contained in:
Eric Rosenbaum 2016-11-09 10:41:03 -05:00
parent 7a25ced256
commit a4e18dc2f4
1 changed files with 5 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
src/vocoder.js
View file

@ -1,14 +1,8 @@
/*
*/
var Tone = require('tone');
function Vocoder () {
Tone.Effect.call(this);
this.FILTER_QUALITY = 6; // The Q value for the carrier and modulator filters
this.modulatorInput = new Tone.Gain();
this.carrierInput = new Tone.Gain();
this.outputGain = new Tone.Gain();
@ -52,6 +46,8 @@ Vocoder.prototype.generateVocoderBands = function (startFreq, endFreq, numBands)
Vocoder.prototype.initBandpassFilters = function () {
var FILTER_QUALITY = 6; // The Q value for the carrier and modulator filters
// Set up a high-pass filter to add back in the fricatives, etc.
var hpFilter = new Tone.Filter(8000, 'highpass');
this.modulatorInput.connect(hpFilter);
@ -62,12 +58,11 @@ Vocoder.prototype.initBandpassFilters = function () {
// CREATE THE MODULATOR CHAIN
// create the bandpass filter in the modulator chain
var modulatorFilter = new Tone.Filter(this.vocoderBands[i].frequency, 'bandpass', -24);
modulatorFilter.Q.value = this.FILTER_QUALITY;
modulatorFilter.Q.value = FILTER_QUALITY;
this.modulatorInput.connect(modulatorFilter);
// create a post-filtering gain to bump the levels up.
var modulatorFilterPostGain = new Tone.Gain();
modulatorFilterPostGain.gain.value = 6;
var modulatorFilterPostGain = new Tone.Gain(6);
modulatorFilter.connect(modulatorFilterPostGain);
// Create the sine oscillator for the heterodyne
@ -91,7 +86,6 @@ Vocoder.prototype.initBandpassFilters = function () {
rectifier.connect(lpFilter);
var lpFilterPostGain = new Tone.Gain();
lpFilterPostGain.gain.value = 1.0;
lpFilter.connect(lpFilterPostGain);
var waveshaper = new Tone.WaveShaper([1, 0, 1]);
@ -99,7 +93,7 @@ Vocoder.prototype.initBandpassFilters = function () {
// Create the bandpass filter in the carrier chain
var carrierFilter = new Tone.Filter(this.vocoderBands[i].frequency, 'bandpass', -24);
carrierFilter.Q.value = this.FILTER_QUALITY;
carrierFilter.Q.value = FILTER_QUALITY;
this.carrierInput.connect(carrierFilter);
var carrierFilterPostGain = new Tone.Gain(10);