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add robotic effect, aka vocoder

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This commit is contained in:
Eric Rosenbaum 2016-11-08 15:07:32 -05:00
parent f7141fe97b
commit b0786e6dbf
1 changed files with 10 additions and 3 deletions
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13
src/index.js
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@ -1,6 +1,7 @@
var log = require('./log');
var Tone = require('tone');
var Soundfont = require('soundfont-player');
var Vocoder = require('./vocoder');
function AudioEngine (sounds) {
@ -16,12 +17,13 @@ function AudioEngine (sounds) {
this.reverb = new Tone.Freeverb();
this.distortion = new Tone.Distortion(1);
this.pitchEffectValue;
this.vocoder = new Vocoder();
// the effects are chained to an effects node for this clone, then to the master output
// so audio is sent from each player or instrument, through the effects in order, then out
// note that the pitch effect works differently - it sets the playback rate for each player
this.effectsNode = new Tone.Gain();
this.effectsNode.chain(this.distortion, this.delay, this.panner, this.reverb, Tone.Master);
this.effectsNode.chain(this.vocoder, this.distortion, this.delay, this.panner, this.reverb, Tone.Master);
// reset effects to their default parameters
this.clearEffects();
@ -179,7 +181,7 @@ AudioEngine.prototype.setEffect = function (effect, value) {
this.distortion.wet.value = value / 100;
break;
case 'ROBOTIC' :
// vocoder effect?
this.vocoder.wet.value = value / 100;
break;
}
};
@ -206,7 +208,8 @@ AudioEngine.prototype.changeEffect = function (effect, value) {
this.distortion.wet.value = this._clamp(this.distortion.wet.value, 0, 1);
break;
case 'ROBOTIC' :
// vocoder effect?
this.vocoder.wet.value += value / 100;
this.vocoder.wet.value = this._clamp(this.vocoder.wet.value, 0, 1);
break;
}
@ -225,6 +228,9 @@ AudioEngine.prototype._setPitchShift = function (value) {
s.playbackRate.value = ratio;
}
}
var freq = this._getPitchRatio() * Tone.Frequency('C3').eval();
this.vocoder.setCarrierOscFrequency(freq);
};
AudioEngine.prototype._getPitchRatio = function () {
@ -246,6 +252,7 @@ AudioEngine.prototype.clearEffects = function () {
this.panner.pan.value = 0;
this.reverb.wet.value = 0;
this.distortion.wet.value = 0;
this.vocoder.wet.value = 0;
this.effectsNode.gain.value = 1;
};