scratchfoundation/scratch-audio
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each clone has its own effects chain

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This commit is contained in:
Eric Rosenbaum 2016-10-17 16:51:12 -04:00
parent 67d805909b
commit 72733b6e7a
1 changed files with 11 additions and 4 deletions
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15
src/index.js
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@ -12,10 +12,14 @@ function AudioEngine (sounds) {
this.delay = new Tone.FeedbackDelay(0.25, 0.5); this.delay = new Tone.FeedbackDelay(0.25, 0.5);
this.panner = new Tone.Panner(); this.panner = new Tone.Panner();
this.reverb = new Tone.Freeverb(); this.reverb = new Tone.Freeverb();
this.pitchShiftRatio = 1;
this.clearEffects(); this.clearEffects();
Tone.Master.chain(this.delay, this.panner, this.reverb); this.effectsNode = new Tone.Gain();
this.effectsNode.chain(this.delay, this.panner, this.reverb, Tone.Master);
// Tone.Master.chain(this.delay, this.panner, this.reverb);
// drum sounds // drum sounds
@ -38,7 +42,7 @@ function AudioEngine (sounds) {
Soundfont.instrument(Tone.context, this.instrumentNames[0]).then( Soundfont.instrument(Tone.context, this.instrumentNames[0]).then(
function (inst) { function (inst) {
this.instrument = inst; this.instrument = inst;
this.instrument.connect(Tone.Master); this.instrument.connect(this.effectsNode);
}.bind(this) }.bind(this)
); );
} }
@ -46,7 +50,8 @@ function AudioEngine (sounds) {
AudioEngine.prototype.loadSounds = function (sounds) { AudioEngine.prototype.loadSounds = function (sounds) {
for (var i=0; i<sounds.length; i++) { for (var i=0; i<sounds.length; i++) {
var url = sounds[i].fileUrl; var url = sounds[i].fileUrl;
var sampler = new Tone.Sampler(url).toMaster(); var sampler = new Tone.Sampler(url);
sampler.connect(this.effectsNode);
this.soundSamplers.push(sampler); this.soundSamplers.push(sampler);
} }
}; };
@ -114,13 +119,15 @@ AudioEngine.prototype.changeEffect = function (effect, value) {
this.reverb.wet.value = this._clamp(this.reverb.wet.value, 0, 1); this.reverb.wet.value = this._clamp(this.reverb.wet.value, 0, 1);
break; break;
case 'PITCH': case 'PITCH':
this._setPitchShift(this.pitchShiftRatio + (value / 20));
break; break;
} }
}; };
AudioEngine.prototype._setPitchShift = function (value) { AudioEngine.prototype._setPitchShift = function (value) {
this.pitchShiftRatio = value;
for (var i in this.soundSamplers) { for (var i in this.soundSamplers) {
this.soundSamplers[i].player.playbackRate = 1 + value; this.soundSamplers[i].player.playbackRate = 1 + this.pitchShiftRatio;
} }
}; };