Tone.js/src/instrument/Sampler.js

///////////////////////////////////////////////////////////////////////////////
//
//  SAMPLE PLAYER
//
//	dependencies : Tone, Player, Envelope, LFO
///////////////////////////////////////////////////////////////////////////////


Tone.Sampler = function(url){
	Tone.call(this);

	//components
	this.player = new Tone.Player(url);
	this.envelope = new Tone.Envelope(.1, .01, .1, 1);
	this.filter = this.context.createBiquadFilter();
	this.filter.type = "lowpass";
	this.filter.Q.value = 12;
	this.filterEnvelope = new Tone.Envelope(.4, 0, 1, .6, this.filter.frequency, 0, 1200);

	//connect it up
	this.chain(this.player, this.envelope, this.filter, this.output);
}

Tone.extend(Tone.Sampler, Tone);


//@param {function()=} callback
Tone.Sampler.prototype.load = function(callback){
	this.player.load(callback);
}

Tone.Sampler.prototype.triggerAttack = function(startTime){
	this.player.start(startTime);
	this.envelope.triggerAttack(startTime);
	this.filterEnvelope.triggerAttack(startTime);
}

Tone.Sampler.prototype.triggerRelease = function(stopTime){
	stopTime = this.defaultArg(stopTime, this.now());
	this.player.stop(stopTime + Math.max(this.envelope.release, this.filterEnvelope.release));
	this.envelope.triggerRelease(stopTime);
	this.filterEnvelope.triggerRelease(stopTime);
}