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

pitch shift effect 10 units per semitone

Browse source
This commit is contained in:
Eric Rosenbaum 2016-10-25 22:00:21 -04:00
parent b30996997a
commit 85c4c03076
1 changed files with 6 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/index.js
View file

@ -14,7 +14,7 @@ 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; this.pitchEffectValue;
// the effects are chained to an effects node for this clone, then to the master output // 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 // so audio is sent from each player or instrument, through the effects in order, then out
@ -152,7 +152,7 @@ AudioEngine.prototype.setEffect = function (effect, value) {
this.reverb.wet.value = value / 100; this.reverb.wet.value = value / 100;
break; break;
case 'PITCH': case 'PITCH':
this._setPitchShift(value / 100); this._setPitchShift(value);
break; break;
} }
}; };
@ -172,20 +172,21 @@ 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 / 100)); this._setPitchShift(this.pitchEffectValue + Number(value));
break; break;
} }
}; };
AudioEngine.prototype._setPitchShift = function (value) { AudioEngine.prototype._setPitchShift = function (value) {
this.pitchShiftRatio = value; this.pitchEffectValue = value;
if (!this.soundPlayers) { if (!this.soundPlayers) {
return; return;
} }
var ratio = this.tone.intervalToFrequencyRatio(this.pitchEffectValue / 10);
for (var i=0; i<this.soundPlayers.length; i++) { for (var i=0; i<this.soundPlayers.length; i++) {
var s = this.soundPlayers[i]; var s = this.soundPlayers[i];
if (s) { if (s) {
s.playbackRate = 1 + this.pitchShiftRatio; s.playbackRate = ratio;
} }
} }
}; };