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phaser-plugin.js
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phaser-plugin.js
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/**
* PHASER PLUGIN for Volca Sampler
*
* Created by Ben Wiley 2023
*
* MIT License:
* https://github.com/benwiley4000/volca-sampler-plugins/blob/master/LICENSE
*
* Tuna.js is MIT Licensed:
* https://github.com/Theodeus/tuna/blob/master/tuna.js#L1-L14
*/
samplePlugin.params = {
rate: {
label: "Rate",
value: 1.5,
min: 0.01,
max: 8,
},
depth: {
label: "Depth",
value: 0.5,
min: 0,
max: 1,
},
};
/**
* @param {AudioBuffer} audioBuffer
*/
function samplePlugin(audioBuffer) {
const rate = samplePlugin.params.rate.value;
const depth = samplePlugin.params.depth.value;
const { numberOfChannels, sampleRate, length } = audioBuffer;
const audioContext = new OfflineAudioContext({
numberOfChannels,
sampleRate,
length,
});
const bufferSource = audioContext.createBufferSource();
bufferSource.buffer = audioBuffer;
const tuna = new Tuna(audioContext);
const phaser = new tuna.Phaser({ rate, depth });
bufferSource.connect(phaser);
phaser.connect(audioContext.destination);
bufferSource.start();
return audioContext.startRendering();
}
/**
* Tuna.js is MIT Licensed:
* https://github.com/Theodeus/tuna/blob/master/tuna.js#L1-L14
*/
// prettier-ignore
(function(){var userContext,userInstance,pipe=function(param,val){param.value=val},Super=Object.create(null,{activate:{writable:true,value:function(doActivate){if(doActivate){this.input.disconnect();this.input.connect(this.activateNode);if(this.activateCallback){this.activateCallback(doActivate)}}else{this.input.disconnect();this.input.connect(this.output)}}},bypass:{get:function(){return this._bypass},set:function(value){if(this._lastBypassValue===value){return}this._bypass=value;this.activate(!value);this._lastBypassValue=value}},connect:{value:function(target){this.output.connect(target)}},disconnect:{value:function(target){this.output.disconnect(target)}},connectInOrder:{value:function(nodeArray){var i=nodeArray.length-1;while(i--){if(!nodeArray[i].connect){return console.error("AudioNode.connectInOrder: TypeError: Not an AudioNode.",nodeArray[i])}if(nodeArray[i+1].input){nodeArray[i].connect(nodeArray[i+1].input)}else{nodeArray[i].connect(nodeArray[i+1])}}}},getDefaults:{value:function(){var result={};for(var key in this.defaults){result[key]=this.defaults[key].value}return result}},automate:{value:function(property,value,duration,startTime){var start=startTime?~~(startTime/1e3):userContext.currentTime,dur=duration?~~(duration/1e3):0,_is=this.defaults[property],param=this[property],method;if(param){if(_is.automatable){if(!duration){method="setValueAtTime"}else{method="linearRampToValueAtTime";param.cancelScheduledValues(start);param.setValueAtTime(param.value,start)}param[method](value,dur+start)}else{param=value}}else{console.error("Invalid Property for "+this.name)}}}}),FLOAT="float",BOOLEAN="boolean",STRING="string",INT="int";if(typeof module!=="undefined"&&module.exports){module.exports=Tuna}else if(typeof define==="function"){window.define("Tuna",definition)}else{window.Tuna=Tuna}function definition(){return Tuna}function Tuna(context){if(!(this instanceof Tuna)){return new Tuna(context)}var _window=typeof window==="undefined"?{}:window;if(!_window.AudioContext){_window.AudioContext=_window.webkitAudioContext}if(!context){console.log("tuna.js: Missing audio context! Creating a new context for you.");context=_window.AudioContext&&new _window.AudioContext}if(!context){throw new Error("Tuna cannot initialize because this environment does not support web audio.")}connectify(context);userContext=context;userInstance=this}function connectify(context){if(context.__connectified__===true)return;var gain=context.createGain(),proto=Object.getPrototypeOf(Object.getPrototypeOf(gain)),oconnect=proto.connect;proto.connect=shimConnect;context.__connectified__=true;function shimConnect(){var node=arguments[0];arguments[0]=Super.isPrototypeOf?Super.isPrototypeOf(node)?node.input:node:node.input||node;oconnect.apply(this,arguments);return node}}function dbToWAVolume(db){return Math.max(0,Math.round(100*Math.pow(2,db/6))/100)}function fmod(x,y){var tmp,tmp2,p=0,pY=0,l=0,l2=0;tmp=x.toExponential().match(/^.\.?(.*)e(.+)$/);p=parseInt(tmp[2],10)-(tmp[1]+"").length;tmp=y.toExponential().match(/^.\.?(.*)e(.+)$/);pY=parseInt(tmp[2],10)-(tmp[1]+"").length;if(pY>p){p=pY}tmp2=x%y;if(p<-100||p>20){l=Math.round(Math.log(tmp2)/Math.log(10));l2=Math.pow(10,l);return(tmp2/l2).toFixed(l-p)*l2}else{return parseFloat(tmp2.toFixed(-p))}}function sign(x){if(x===0){return 1}else{return Math.abs(x)/x}}function tanh(n){return(Math.exp(n)-Math.exp(-n))/(Math.exp(n)+Math.exp(-n))}function initValue(userVal,defaultVal){return userVal===undefined?defaultVal:userVal}Tuna.prototype.Bitcrusher=function(properties){if(!properties){properties=this.getDefaults()}this.bufferSize=properties.bufferSize||this.defaults.bufferSize.value;this.input=userContext.createGain();this.activateNode=userContext.createGain();this.processor=userContext.createScriptProcessor(this.bufferSize,1,1);this.output=userContext.createGain();this.activateNode.connect(this.processor);this.processor.connect(this.output);var phaser=0,last=0,input,output,step,i,length;this.processor.onaudioprocess=function(e){input=e.inputBuffer.getChannelData(0),output=e.outputBuffer.getChannelData(0),step=Math.pow(1/2,this.bits);length=input.length;for(i=0;i<length;i++){phaser+=this.normfreq;if(phaser>=1){phaser-=1;last=step*Math.floor(input[i]/step+.5)}output[i]=last}};this.bits=properties.bits||this.defaults.bits.value;this.normfreq=initValue(properties.normfreq,this.defaults.normfreq.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Bitcrusher.prototype=Object.create(Super,{name:{value:"Bitcrusher"},defaults:{writable:true,value:{bits:{value:4,min:1,max:16,automatable:false,type:INT},bufferSize:{value:4096,min:256,max:16384,automatable:false,type:INT},bypass:{value:false,automatable:false,type:BOOLEAN},normfreq:{value:.1,min:1e-4,max:1,automatable:false,type:FLOAT}}},bits:{enumerable:true,get:function(){return this.processor.bits},set:function(value){this.processor.bits=value}},normfreq:{enumerable:true,get:function(){return this.processor.normfreq},set:function(value){this.processor.normfreq=value}}});Tuna.prototype.Cabinet=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.convolver=this.newConvolver(properties.impulsePath||"../impulses/impulse_guitar.wav");this.makeupNode=userContext.createGain();this.output=userContext.createGain();this.activateNode.connect(this.convolver.input);this.convolver.output.connect(this.makeupNode);this.makeupNode.connect(this.output);this.makeupNode.gain.value=initValue(properties.makeupGain,this.defaults.makeupGain.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Cabinet.prototype=Object.create(Super,{name:{value:"Cabinet"},defaults:{writable:true,value:{makeupGain:{value:1,min:0,max:20,automatable:true,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},makeupGain:{enumerable:true,get:function(){return this.makeupNode.gain},set:function(value){this.makeupNode.gain.setTargetAtTime(value,userContext.currentTime,.01)}},newConvolver:{value:function(impulsePath){return new userInstance.Convolver({impulse:impulsePath,dryLevel:0,wetLevel:1})}}});Tuna.prototype.Chorus=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.attenuator=this.activateNode=userContext.createGain();this.splitter=userContext.createChannelSplitter(2);this.delayL=userContext.createDelay();this.delayR=userContext.createDelay();this.feedbackGainNodeLR=userContext.createGain();this.feedbackGainNodeRL=userContext.createGain();this.merger=userContext.createChannelMerger(2);this.output=userContext.createGain();this.lfoL=new userInstance.LFO({target:this.delayL.delayTime,callback:pipe});this.lfoR=new userInstance.LFO({target:this.delayR.delayTime,callback:pipe});this.input.connect(this.attenuator);this.attenuator.connect(this.output);this.attenuator.connect(this.splitter);this.splitter.connect(this.delayL,0);this.splitter.connect(this.delayR,1);this.delayL.connect(this.feedbackGainNodeLR);this.delayR.connect(this.feedbackGainNodeRL);this.feedbackGainNodeLR.connect(this.delayR);this.feedbackGainNodeRL.connect(this.delayL);this.delayL.connect(this.merger,0,0);this.delayR.connect(this.merger,0,1);this.merger.connect(this.output);this.feedback=initValue(properties.feedback,this.defaults.feedback.value);this.rate=initValue(properties.rate,this.defaults.rate.value);this.delay=initValue(properties.delay,this.defaults.delay.value);this.depth=initValue(properties.depth,this.defaults.depth.value);this.lfoR.phase=Math.PI/2;this.attenuator.gain.value=.6934;this.lfoL.activate(true);this.lfoR.activate(true);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Chorus.prototype=Object.create(Super,{name:{value:"Chorus"},defaults:{writable:true,value:{feedback:{value:.4,min:0,max:.95,automatable:false,type:FLOAT},delay:{value:.0045,min:0,max:1,automatable:false,type:FLOAT},depth:{value:.7,min:0,max:1,automatable:false,type:FLOAT},rate:{value:1.5,min:0,max:8,automatable:false,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},delay:{enumerable:true,get:function(){return this._delay},set:function(value){this._delay=2e-4*(Math.pow(10,value)*2);this.lfoL.offset=this._delay;this.lfoR.offset=this._delay;this._depth=this._depth}},depth:{enumerable:true,get:function(){return this._depth},set:function(value){this._depth=value;this.lfoL.oscillation=this._depth*this._delay;this.lfoR.oscillation=this._depth*this._delay}},feedback:{enumerable:true,get:function(){return this._feedback},set:function(value){this._feedback=value;this.feedbackGainNodeLR.gain.setTargetAtTime(this._feedback,userContext.currentTime,.01);this.feedbackGainNodeRL.gain.setTargetAtTime(this._feedback,userContext.currentTime,.01)}},rate:{enumerable:true,get:function(){return this._rate},set:function(value){this._rate=value;this.lfoL.frequency=this._rate;this.lfoR.frequency=this._rate}}});Tuna.prototype.Compressor=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.compNode=this.activateNode=userContext.createDynamicsCompressor();this.makeupNode=userContext.createGain();this.output=userContext.createGain();this.compNode.connect(this.makeupNode);this.makeupNode.connect(this.output);this.automakeup=initValue(properties.automakeup,this.defaults.automakeup.value);if(this.automakeup){this.makeupNode.gain.value=dbToWAVolume(this.computeMakeup())}else{this.makeupNode.gain.value=dbToWAVolume(initValue(properties.makeupGain,this.defaults.makeupGain.value))}this.threshold=initValue(properties.threshold,this.defaults.threshold.value);this.release=initValue(properties.release,this.defaults.release.value);this.attack=initValue(properties.attack,this.defaults.attack.value);this.ratio=properties.ratio||this.defaults.ratio.value;this.knee=initValue(properties.knee,this.defaults.knee.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Compressor.prototype=Object.create(Super,{name:{value:"Compressor"},defaults:{writable:true,value:{threshold:{value:-20,min:-60,max:0,automatable:true,type:FLOAT},release:{value:250,min:10,max:2e3,automatable:true,type:FLOAT},makeupGain:{value:1,min:1,max:100,automatable:true,type:FLOAT},attack:{value:1,min:0,max:1e3,automatable:true,type:FLOAT},ratio:{value:4,min:1,max:50,automatable:true,type:FLOAT},knee:{value:5,min:0,max:40,automatable:true,type:FLOAT},automakeup:{value:false,automatable:false,type:BOOLEAN},bypass:{value:false,automatable:false,type:BOOLEAN}}},computeMakeup:{value:function(){var magicCoefficient=4,c=this.compNode;return-(c.threshold.value-c.threshold.value/c.ratio.value)/magicCoefficient}},automakeup:{enumerable:true,get:function(){return this._automakeup},set:function(value){this._automakeup=value;if(this._automakeup)this.makeupGain=this.computeMakeup()}},threshold:{enumerable:true,get:function(){return this.compNode.threshold},set:function(value){this.compNode.threshold.value=value;if(this._automakeup)this.makeupGain=this.computeMakeup()}},ratio:{enumerable:true,get:function(){return this.compNode.ratio},set:function(value){this.compNode.ratio.value=value;if(this._automakeup)this.makeupGain=this.computeMakeup()}},knee:{enumerable:true,get:function(){return this.compNode.knee},set:function(value){this.compNode.knee.value=value;if(this._automakeup)this.makeupGain=this.computeMakeup()}},attack:{enumerable:true,get:function(){return this.compNode.attack},set:function(value){this.compNode.attack.value=value/1e3}},release:{enumerable:true,get:function(){return this.compNode.release},set:function(value){this.compNode.release.value=value/1e3}},makeupGain:{enumerable:true,get:function(){return this.makeupNode.gain},set:function(value){this.makeupNode.gain.setTargetAtTime(dbToWAVolume(value),userContext.currentTime,.01)}}});Tuna.prototype.Convolver=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.convolver=userContext.createConvolver();this.dry=userContext.createGain();this.filterLow=userContext.createBiquadFilter();this.filterHigh=userContext.createBiquadFilter();this.wet=userContext.createGain();this.output=userContext.createGain();this.activateNode.connect(this.filterLow);this.activateNode.connect(this.dry);this.filterLow.connect(this.filterHigh);this.filterHigh.connect(this.convolver);this.convolver.connect(this.wet);this.wet.connect(this.output);this.dry.connect(this.output);this.dry.gain.value=initValue(properties.dryLevel,this.defaults.dryLevel.value);this.wet.gain.value=initValue(properties.wetLevel,this.defaults.wetLevel.value);this.filterHigh.frequency.value=properties.highCut||this.defaults.highCut.value;this.filterLow.frequency.value=properties.lowCut||this.defaults.lowCut.value;this.output.gain.value=initValue(properties.level,this.defaults.level.value);this.filterHigh.type="lowpass";this.filterLow.type="highpass";this.buffer=properties.impulse||"../impulses/ir_rev_short.wav";this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Convolver.prototype=Object.create(Super,{name:{value:"Convolver"},defaults:{writable:true,value:{highCut:{value:22050,min:20,max:22050,automatable:true,type:FLOAT},lowCut:{value:20,min:20,max:22050,automatable:true,type:FLOAT},dryLevel:{value:1,min:0,max:1,automatable:true,type:FLOAT},wetLevel:{value:1,min:0,max:1,automatable:true,type:FLOAT},level:{value:1,min:0,max:1,automatable:true,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},lowCut:{get:function(){return this.filterLow.frequency},set:function(value){this.filterLow.frequency.setTargetAtTime(value,userContext.currentTime,.01)}},highCut:{get:function(){return this.filterHigh.frequency},set:function(value){this.filterHigh.frequency.setTargetAtTime(value,userContext.currentTime,.01)}},level:{get:function(){return this.output.gain},set:function(value){this.output.gain.setTargetAtTime(value,userContext.currentTime,.01)}},dryLevel:{get:function(){return this.dry.gain},set:function(value){this.dry.gain.setTargetAtTime(value,userContext.currentTime,.01)}},wetLevel:{get:function(){return this.wet.gain},set:function(value){this.wet.gain.setTargetAtTime(value,userContext.currentTime,.01)}},buffer:{enumerable:false,get:function(){return this.convolver.buffer},set:function(impulse){var convolver=this.convolver,xhr=new XMLHttpRequest;if(!impulse){console.log("Tuna.Convolver.setBuffer: Missing impulse path!");return}xhr.open("GET",impulse,true);xhr.responseType="arraybuffer";xhr.onreadystatechange=function(){if(xhr.readyState===4){if(xhr.status<300&&xhr.status>199||xhr.status===302){userContext.decodeAudioData(xhr.response,function(buffer){convolver.buffer=buffer},function(e){if(e)console.log("Tuna.Convolver.setBuffer: Error decoding data"+e)})}}};xhr.send(null)}}});Tuna.prototype.Delay=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.dry=userContext.createGain();this.wet=userContext.createGain();this.filter=userContext.createBiquadFilter();this.delay=userContext.createDelay(10);this.feedbackNode=userContext.createGain();this.output=userContext.createGain();this.activateNode.connect(this.delay);this.activateNode.connect(this.dry);this.delay.connect(this.filter);this.filter.connect(this.feedbackNode);this.feedbackNode.connect(this.delay);this.feedbackNode.connect(this.wet);this.wet.connect(this.output);this.dry.connect(this.output);this.delayTime=properties.delayTime||this.defaults.delayTime.value;this.feedbackNode.gain.value=initValue(properties.feedback,this.defaults.feedback.value);this.wet.gain.value=initValue(properties.wetLevel,this.defaults.wetLevel.value);this.dry.gain.value=initValue(properties.dryLevel,this.defaults.dryLevel.value);this.filter.frequency.value=properties.cutoff||this.defaults.cutoff.value;this.filter.type="lowpass";this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Delay.prototype=Object.create(Super,{name:{value:"Delay"},defaults:{writable:true,value:{delayTime:{value:100,min:20,max:1e3,automatable:false,type:FLOAT},feedback:{value:.45,min:0,max:.9,automatable:true,type:FLOAT},cutoff:{value:2e4,min:20,max:2e4,automatable:true,type:FLOAT},wetLevel:{value:.5,min:0,max:1,automatable:true,type:FLOAT},dryLevel:{value:1,min:0,max:1,automatable:true,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},delayTime:{enumerable:true,get:function(){return this.delay.delayTime},set:function(value){this.delay.delayTime.value=value/1e3}},wetLevel:{enumerable:true,get:function(){return this.wet.gain},set:function(value){this.wet.gain.setTargetAtTime(value,userContext.currentTime,.01)}},dryLevel:{enumerable:true,get:function(){return this.dry.gain},set:function(value){this.dry.gain.setTargetAtTime(value,userContext.currentTime,.01)}},feedback:{enumerable:true,get:function(){return this.feedbackNode.gain},set:function(value){this.feedbackNode.gain.setTargetAtTime(value,userContext.currentTime,.01)}},cutoff:{enumerable:true,get:function(){return this.filter.frequency},set:function(value){this.filter.frequency.setTargetAtTime(value,userContext.currentTime,.01)}}});Tuna.prototype.Filter=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.filter=userContext.createBiquadFilter();this.output=userContext.createGain();this.activateNode.connect(this.filter);this.filter.connect(this.output);this.filter.frequency.value=properties.frequency||this.defaults.frequency.value;this.Q=properties.resonance||this.defaults.Q.value;this.filterType=initValue(properties.filterType,this.defaults.filterType.value);this.filter.gain.value=initValue(properties.gain,this.defaults.gain.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Filter.prototype=Object.create(Super,{name:{value:"Filter"},defaults:{writable:true,value:{frequency:{value:800,min:20,max:22050,automatable:true,type:FLOAT},Q:{value:1,min:.001,max:100,automatable:true,type:FLOAT},gain:{value:0,min:-40,max:40,automatable:true,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN},filterType:{value:"lowpass",automatable:false,type:STRING}}},filterType:{enumerable:true,get:function(){return this.filter.type},set:function(value){this.filter.type=value}},Q:{enumerable:true,get:function(){return this.filter.Q},set:function(value){this.filter.Q.value=value}},gain:{enumerable:true,get:function(){return this.filter.gain},set:function(value){this.filter.gain.setTargetAtTime(value,userContext.currentTime,.01)}},frequency:{enumerable:true,get:function(){return this.filter.frequency},set:function(value){this.filter.frequency.setTargetAtTime(value,userContext.currentTime,.01)}}});Tuna.prototype.Gain=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.gainNode=userContext.createGain();this.output=userContext.createGain();this.activateNode.connect(this.gainNode);this.gainNode.connect(this.output);this.gainNode.gain.value=initValue(properties.gain,this.defaults.gain.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Gain.prototype=Object.create(Super,{name:{value:"Gain"},defaults:{writable:true,value:{bypass:{value:false,automatable:false,type:BOOLEAN},gain:{value:1,automatable:true,type:FLOAT}}},gain:{enumerable:true,get:function(){return this.gainNode.gain},set:function(value){this.gainNode.gain.setTargetAtTime(value,userContext.currentTime,.01)}}});Tuna.prototype.MoogFilter=function(properties){if(!properties){properties=this.getDefaults()}this.bufferSize=properties.bufferSize||this.defaults.bufferSize.value;this.input=userContext.createGain();this.activateNode=userContext.createGain();this.processor=userContext.createScriptProcessor(this.bufferSize,1,1);this.output=userContext.createGain();this.activateNode.connect(this.processor);this.processor.connect(this.output);var in1,in2,in3,in4,out1,out2,out3,out4;in1=in2=in3=in4=out1=out2=out3=out4=0;var input,output,f,fb,i,length,inputFactor;this.processor.onaudioprocess=function(e){input=e.inputBuffer.getChannelData(0);output=e.outputBuffer.getChannelData(0);f=this.cutoff*1.16;inputFactor=.35013*(f*f)*(f*f);fb=this.resonance*(1-.15*f*f);length=input.length;for(i=0;i<length;i++){input[i]-=out4*fb;input[i]*=inputFactor;out1=input[i]+.3*in1+(1-f)*out1;in1=input[i];out2=out1+.3*in2+(1-f)*out2;in2=out1;out3=out2+.3*in3+(1-f)*out3;in3=out2;out4=out3+.3*in4+(1-f)*out4;in4=out3;output[i]=out4}};this.cutoff=initValue(properties.cutoff,this.defaults.cutoff.value);this.resonance=initValue(properties.resonance,this.defaults.resonance.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.MoogFilter.prototype=Object.create(Super,{name:{value:"MoogFilter"},defaults:{writable:true,value:{bufferSize:{value:4096,min:256,max:16384,automatable:false,type:INT},bypass:{value:false,automatable:false,type:BOOLEAN},cutoff:{value:.065,min:1e-4,max:1,automatable:false,type:FLOAT},resonance:{value:3.5,min:0,max:4,automatable:false,type:FLOAT}}},cutoff:{enumerable:true,get:function(){return this.processor.cutoff},set:function(value){this.processor.cutoff=value}},resonance:{enumerable:true,get:function(){return this.processor.resonance},set:function(value){this.processor.resonance=value}}});Tuna.prototype.Overdrive=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.inputDrive=userContext.createGain();this.waveshaper=userContext.createWaveShaper();this.outputDrive=userContext.createGain();this.output=userContext.createGain();this.activateNode.connect(this.inputDrive);this.inputDrive.connect(this.waveshaper);this.waveshaper.connect(this.outputDrive);this.outputDrive.connect(this.output);this.ws_table=new Float32Array(this.k_nSamples);this.drive=initValue(properties.drive,this.defaults.drive.value);this.outputGain=initValue(properties.outputGain,this.defaults.outputGain.value);this.curveAmount=initValue(properties.curveAmount,this.defaults.curveAmount.value);this.algorithmIndex=initValue(properties.algorithmIndex,this.defaults.algorithmIndex.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Overdrive.prototype=Object.create(Super,{name:{value:"Overdrive"},defaults:{writable:true,value:{drive:{value:.197,min:0,max:1,automatable:true,type:FLOAT,scaled:true},outputGain:{value:-9.154,min:-46,max:0,automatable:true,type:FLOAT,scaled:true},curveAmount:{value:.979,min:0,max:1,automatable:false,type:FLOAT},algorithmIndex:{value:0,min:0,max:5,automatable:false,type:INT},bypass:{value:false,automatable:false,type:BOOLEAN}}},k_nSamples:{value:8192},drive:{get:function(){return this.inputDrive.gain},set:function(value){this.inputDrive.gain.value=value}},curveAmount:{get:function(){return this._curveAmount},set:function(value){this._curveAmount=value;if(this._algorithmIndex===undefined){this._algorithmIndex=0}this.waveshaperAlgorithms[this._algorithmIndex](this._curveAmount,this.k_nSamples,this.ws_table);this.waveshaper.curve=this.ws_table}},outputGain:{get:function(){return this.outputDrive.gain},set:function(value){this._outputGain=dbToWAVolume(value);this.outputDrive.gain.setValueAtTime(this._outputGain,userContext.currentTime,.01)}},algorithmIndex:{get:function(){return this._algorithmIndex},set:function(value){this._algorithmIndex=value;this.curveAmount=this._curveAmount}},waveshaperAlgorithms:{value:[function(amount,n_samples,ws_table){amount=Math.min(amount,.9999);var k=2*amount/(1-amount),i,x;for(i=0;i<n_samples;i++){x=i*2/n_samples-1;ws_table[i]=(1+k)*x/(1+k*Math.abs(x))}},function(amount,n_samples,ws_table){var i,x,y;for(i=0;i<n_samples;i++){x=i*2/n_samples-1;y=(.5*Math.pow(x+1.4,2)-1)*(y>=0?5.8:1.2);ws_table[i]=tanh(y)}},function(amount,n_samples,ws_table){var i,x,y,a=1-amount;for(i=0;i<n_samples;i++){x=i*2/n_samples-1;y=x<0?-Math.pow(Math.abs(x),a+.04):Math.pow(x,a);ws_table[i]=tanh(y*2)}},function(amount,n_samples,ws_table){var i,x,y,abx,a=1-amount>.99?.99:1-amount;for(i=0;i<n_samples;i++){x=i*2/n_samples-1;abx=Math.abs(x);if(abx<a){y=abx}else if(abx>a){y=a+(abx-a)/(1+Math.pow((abx-a)/(1-a),2))}else if(abx>1){y=abx}ws_table[i]=sign(x)*y*(1/((a+1)/2))}},function(amount,n_samples,ws_table){var i,x;for(i=0;i<n_samples;i++){x=i*2/n_samples-1;if(x<-.08905){ws_table[i]=-3/4*(1-Math.pow(1-(Math.abs(x)-.032857),12)+1/3*(Math.abs(x)-.032847))+.01}else if(x>=-.08905&&x<.320018){ws_table[i]=-6.153*(x*x)+3.9375*x}else{ws_table[i]=.630035}}},function(amount,n_samples,ws_table){var a=2+Math.round(amount*14),bits=Math.round(Math.pow(2,a-1)),i,x;for(i=0;i<n_samples;i++){x=i*2/n_samples-1;ws_table[i]=Math.round(x*bits)/bits}}]}});Tuna.prototype.Panner=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.panner=userContext.createStereoPanner();this.output=userContext.createGain();this.activateNode.connect(this.panner);this.panner.connect(this.output);this.pan=initValue(properties.pan,this.defaults.pan.value);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Panner.prototype=Object.create(Super,{name:{value:"Panner"},defaults:{writable:true,value:{bypass:{value:false,automatable:false,type:BOOLEAN},pan:{value:0,min:-1,max:1,automatable:true,type:FLOAT}}},pan:{enumerable:true,get:function(){return this.panner.pan},set:function(value){this.panner.pan.value=value}}});Tuna.prototype.Phaser=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.splitter=this.activateNode=userContext.createChannelSplitter(2);this.filtersL=[];this.filtersR=[];this.feedbackGainNodeL=userContext.createGain();this.feedbackGainNodeR=userContext.createGain();this.merger=userContext.createChannelMerger(2);this.filteredSignal=userContext.createGain();this.output=userContext.createGain();this.lfoL=new userInstance.LFO({target:this.filtersL,callback:this.callback});this.lfoR=new userInstance.LFO({target:this.filtersR,callback:this.callback});var i=this.stage;while(i--){this.filtersL[i]=userContext.createBiquadFilter();this.filtersR[i]=userContext.createBiquadFilter();this.filtersL[i].type="allpass";this.filtersR[i].type="allpass"}this.input.connect(this.splitter);this.input.connect(this.output);this.splitter.connect(this.filtersL[0],0,0);this.splitter.connect(this.filtersR[0],1,0);this.connectInOrder(this.filtersL);this.connectInOrder(this.filtersR);this.filtersL[this.stage-1].connect(this.feedbackGainNodeL);this.filtersL[this.stage-1].connect(this.merger,0,0);this.filtersR[this.stage-1].connect(this.feedbackGainNodeR);this.filtersR[this.stage-1].connect(this.merger,0,1);this.feedbackGainNodeL.connect(this.filtersL[0]);this.feedbackGainNodeR.connect(this.filtersR[0]);this.merger.connect(this.output);this.rate=initValue(properties.rate,this.defaults.rate.value);this.baseModulationFrequency=properties.baseModulationFrequency||this.defaults.baseModulationFrequency.value;this.depth=initValue(properties.depth,this.defaults.depth.value);this.feedback=initValue(properties.feedback,this.defaults.feedback.value);this.stereoPhase=initValue(properties.stereoPhase,this.defaults.stereoPhase.value);this.lfoL.activate(true);this.lfoR.activate(true);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Phaser.prototype=Object.create(Super,{name:{value:"Phaser"},stage:{value:4},defaults:{writable:true,value:{rate:{value:.1,min:0,max:8,automatable:false,type:FLOAT},depth:{value:.6,min:0,max:1,automatable:false,type:FLOAT},feedback:{value:.7,min:0,max:1,automatable:false,type:FLOAT},stereoPhase:{value:40,min:0,max:180,automatable:false,type:FLOAT},baseModulationFrequency:{value:700,min:500,max:1500,automatable:false,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},callback:{value:function(filters,value){for(var stage=0;stage<4;stage++){filters[stage].frequency.value=value}}},depth:{get:function(){return this._depth},set:function(value){this._depth=value;this.lfoL.oscillation=this._baseModulationFrequency*this._depth;this.lfoR.oscillation=this._baseModulationFrequency*this._depth}},rate:{get:function(){return this._rate},set:function(value){this._rate=value;this.lfoL.frequency=this._rate;this.lfoR.frequency=this._rate}},baseModulationFrequency:{enumerable:true,get:function(){return this._baseModulationFrequency},set:function(value){this._baseModulationFrequency=value;this.lfoL.offset=this._baseModulationFrequency;this.lfoR.offset=this._baseModulationFrequency;this.depth=this._depth}},feedback:{get:function(){return this._feedback},set:function(value){this._feedback=value;this.feedbackGainNodeL.gain.setTargetAtTime(this._feedback,userContext.currentTime,.01);this.feedbackGainNodeR.gain.setTargetAtTime(this._feedback,userContext.currentTime,.01)}},stereoPhase:{get:function(){return this._stereoPhase},set:function(value){this._stereoPhase=value;var newPhase=this.lfoL._phase+this._stereoPhase*Math.PI/180;newPhase=fmod(newPhase,2*Math.PI);this.lfoR._phase=newPhase}}});Tuna.prototype.PingPongDelay=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.wet=userContext.createGain();this.stereoToMonoMix=userContext.createGain();this.feedbackLevel=userContext.createGain();this.output=userContext.createGain();this.delayLeft=userContext.createDelay(10);this.delayRight=userContext.createDelay(10);this.activateNode=userContext.createGain();this.splitter=userContext.createChannelSplitter(2);this.merger=userContext.createChannelMerger(2);this.activateNode.connect(this.splitter);this.splitter.connect(this.stereoToMonoMix,0,0);this.splitter.connect(this.stereoToMonoMix,1,0);this.stereoToMonoMix.gain.value=.5;this.stereoToMonoMix.connect(this.wet);this.wet.connect(this.delayLeft);this.feedbackLevel.connect(this.wet);this.delayLeft.connect(this.delayRight);this.delayRight.connect(this.feedbackLevel);this.delayLeft.connect(this.merger,0,0);this.delayRight.connect(this.merger,0,1);this.merger.connect(this.output);this.activateNode.connect(this.output);this.delayTimeLeft=properties.delayTimeLeft!==undefined?properties.delayTimeLeft:this.defaults.delayTimeLeft.value;this.delayTimeRight=properties.delayTimeRight!==undefined?properties.delayTimeRight:this.defaults.delayTimeRight.value;this.feedbackLevel.gain.value=properties.feedback!==undefined?properties.feedback:this.defaults.feedback.value;this.wet.gain.value=properties.wetLevel!==undefined?properties.wetLevel:this.defaults.wetLevel.value;this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.PingPongDelay.prototype=Object.create(Super,{name:{value:"PingPongDelay"},delayTimeLeft:{enumerable:true,get:function(){return this._delayTimeLeft},set:function(value){this._delayTimeLeft=value;this.delayLeft.delayTime.value=value/1e3}},delayTimeRight:{enumerable:true,get:function(){return this._delayTimeRight},set:function(value){this._delayTimeRight=value;this.delayRight.delayTime.value=value/1e3}},wetLevel:{enumerable:true,get:function(){return this.wet.gain},set:function(value){this.wet.gain.setTargetAtTime(value,userContext.currentTime,.01)}},feedback:{enumerable:true,get:function(){return this.feedbackLevel.gain},set:function(value){this.feedbackLevel.gain.setTargetAtTime(value,userContext.currentTime,.01)}},defaults:{writable:true,value:{delayTimeLeft:{value:200,min:1,max:1e4,automatable:false,type:INT},delayTimeRight:{value:400,min:1,max:1e4,automatable:false,type:INT},feedback:{value:.3,min:0,max:1,automatable:true,type:FLOAT},wetLevel:{value:.5,min:0,max:1,automatable:true,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}}});Tuna.prototype.Tremolo=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.splitter=this.activateNode=userContext.createChannelSplitter(2);this.amplitudeL=userContext.createGain();this.amplitudeR=userContext.createGain();this.merger=userContext.createChannelMerger(2);this.output=userContext.createGain();this.lfoL=new userInstance.LFO({target:this.amplitudeL.gain,callback:pipe});this.lfoR=new userInstance.LFO({target:this.amplitudeR.gain,callback:pipe});this.input.connect(this.splitter);this.splitter.connect(this.amplitudeL,0);this.splitter.connect(this.amplitudeR,1);this.amplitudeL.connect(this.merger,0,0);this.amplitudeR.connect(this.merger,0,1);this.merger.connect(this.output);this.rate=properties.rate||this.defaults.rate.value;this.intensity=initValue(properties.intensity,this.defaults.intensity.value);this.stereoPhase=initValue(properties.stereoPhase,this.defaults.stereoPhase.value);this.lfoL.offset=1-this.intensity/2;this.lfoR.offset=1-this.intensity/2;this.lfoL.phase=this.stereoPhase*Math.PI/180;this.lfoL.activate(true);this.lfoR.activate(true);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.Tremolo.prototype=Object.create(Super,{name:{value:"Tremolo"},defaults:{writable:true,value:{intensity:{value:.3,min:0,max:1,automatable:false,type:FLOAT},stereoPhase:{value:0,min:0,max:180,automatable:false,type:FLOAT},rate:{value:5,min:.1,max:11,automatable:false,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},intensity:{enumerable:true,get:function(){return this._intensity},set:function(value){this._intensity=value;this.lfoL.offset=1-this._intensity/2;this.lfoR.offset=1-this._intensity/2;this.lfoL.oscillation=this._intensity;this.lfoR.oscillation=this._intensity}},rate:{enumerable:true,get:function(){return this._rate},set:function(value){this._rate=value;this.lfoL.frequency=this._rate;this.lfoR.frequency=this._rate}},stereoPhase:{enumerable:true,get:function(){return this._stereoPhase},set:function(value){this._stereoPhase=value;var newPhase=this.lfoL._phase+this._stereoPhase*Math.PI/180;newPhase=fmod(newPhase,2*Math.PI);this.lfoR.phase=newPhase}}});Tuna.prototype.WahWah=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.activateNode=userContext.createGain();this.envelopeFollower=new userInstance.EnvelopeFollower({target:this,callback:function(context,value){context.sweep=value}});this.filterBp=userContext.createBiquadFilter();this.filterPeaking=userContext.createBiquadFilter();this.output=userContext.createGain();this.activateNode.connect(this.filterBp);this.filterBp.connect(this.filterPeaking);this.filterPeaking.connect(this.output);this.init();this.automode=initValue(properties.automode,this.defaults.automode.value);this.resonance=properties.resonance||this.defaults.resonance.value;this.sensitivity=initValue(properties.sensitivity,this.defaults.sensitivity.value);this.baseFrequency=initValue(properties.baseFrequency,this.defaults.baseFrequency.value);this.excursionOctaves=properties.excursionOctaves||this.defaults.excursionOctaves.value;this.sweep=initValue(properties.sweep,this.defaults.sweep.value);this.activateNode.gain.value=2;this.envelopeFollower.activate(true);this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.WahWah.prototype=Object.create(Super,{name:{value:"WahWah"},defaults:{writable:true,value:{automode:{value:true,automatable:false,type:BOOLEAN},baseFrequency:{value:.153,min:0,max:1,automatable:false,type:FLOAT},excursionOctaves:{value:3.3,min:1,max:6,automatable:false,type:FLOAT},sweep:{value:.35,min:0,max:1,automatable:false,type:FLOAT},resonance:{value:19,min:1,max:100,automatable:false,type:FLOAT},sensitivity:{value:-.5,min:-1,max:1,automatable:false,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},automode:{get:function(){return this._automode},set:function(value){this._automode=value;if(value){this.activateNode.connect(this.envelopeFollower.input);this.envelopeFollower.activate(true)}else{this.envelopeFollower.activate(false);this.activateNode.disconnect();this.activateNode.connect(this.filterBp)}}},filterFreqTimeout:{writable:true,value:0},setFilterFreq:{value:function(){try{this.filterBp.frequency.value=Math.min(22050,this._baseFrequency+this._excursionFrequency*this._sweep);this.filterPeaking.frequency.value=Math.min(22050,this._baseFrequency+this._excursionFrequency*this._sweep)}catch(e){clearTimeout(this.filterFreqTimeout);this.filterFreqTimeout=setTimeout(function(){this.setFilterFreq()}.bind(this),0)}}},sweep:{enumerable:true,get:function(){return this._sweep},set:function(value){this._sweep=Math.pow(value>1?1:value<0?0:value,this._sensitivity);this.setFilterFreq()}},baseFrequency:{enumerable:true,get:function(){return this._baseFrequency},set:function(value){this._baseFrequency=50*Math.pow(10,value*2);this._excursionFrequency=Math.min(userContext.sampleRate/2,this.baseFrequency*Math.pow(2,this._excursionOctaves));this.setFilterFreq()}},excursionOctaves:{enumerable:true,get:function(){return this._excursionOctaves},set:function(value){this._excursionOctaves=value;this._excursionFrequency=Math.min(userContext.sampleRate/2,this.baseFrequency*Math.pow(2,this._excursionOctaves));this.setFilterFreq()}},sensitivity:{enumerable:true,get:function(){return this._sensitivity},set:function(value){this._sensitivity=Math.pow(10,value)}},resonance:{enumerable:true,get:function(){return this._resonance},set:function(value){this._resonance=value;this.filterPeaking.Q.value=this._resonance}},init:{value:function(){this.output.gain.value=1;this.filterPeaking.type="peaking";this.filterBp.type="bandpass";this.filterPeaking.frequency.value=100;this.filterPeaking.gain.value=20;this.filterPeaking.Q.value=5;this.filterBp.frequency.value=100;this.filterBp.Q.value=1}}});Tuna.prototype.EnvelopeFollower=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.jsNode=this.output=userContext.createScriptProcessor(this.buffersize,1,1);this.input.connect(this.output);this.attackTime=initValue(properties.attackTime,this.defaults.attackTime.value);this.releaseTime=initValue(properties.releaseTime,this.defaults.releaseTime.value);this._envelope=0;this.target=properties.target||{};this.callback=properties.callback||function(){};this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.EnvelopeFollower.prototype=Object.create(Super,{name:{value:"EnvelopeFollower"},defaults:{value:{attackTime:{value:.003,min:0,max:.5,automatable:false,type:FLOAT},releaseTime:{value:.5,min:0,max:.5,automatable:false,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},buffersize:{value:256},envelope:{value:0},sampleRate:{value:44100},attackTime:{enumerable:true,get:function(){return this._attackTime},set:function(value){this._attackTime=value;this._attackC=Math.exp(-1/this._attackTime*this.sampleRate/this.buffersize)}},releaseTime:{enumerable:true,get:function(){return this._releaseTime},set:function(value){this._releaseTime=value;this._releaseC=Math.exp(-1/this._releaseTime*this.sampleRate/this.buffersize)}},callback:{get:function(){return this._callback},set:function(value){if(typeof value==="function"){this._callback=value}else{console.error("tuna.js: "+this.name+": Callback must be a function!")}}},target:{get:function(){return this._target},set:function(value){this._target=value}},activate:{value:function(doActivate){this.activated=doActivate;if(doActivate){this.jsNode.connect(userContext.destination);this.jsNode.onaudioprocess=this.returnCompute(this)}else{this.jsNode.disconnect();this.jsNode.onaudioprocess=null}if(this.activateCallback){this.activateCallback(doActivate)}}},returnCompute:{value:function(instance){return function(event){instance.compute(event)}}},compute:{value:function(event){var count=event.inputBuffer.getChannelData(0).length,channels=event.inputBuffer.numberOfChannels,current,chan,rms,i;chan=rms=i=0;for(chan=0;chan<channels;++chan){for(i=0;i<count;++i){current=event.inputBuffer.getChannelData(chan)[i];rms+=current*current}}rms=Math.sqrt(rms/channels);if(this._envelope<rms){this._envelope*=this._attackC;this._envelope+=(1-this._attackC)*rms}else{this._envelope*=this._releaseC;this._envelope+=(1-this._releaseC)*rms}this._callback(this._target,this._envelope)}}});Tuna.prototype.LFO=function(properties){if(!properties){properties=this.getDefaults()}this.input=userContext.createGain();this.output=userContext.createScriptProcessor(256,1,1);this.activateNode=userContext.destination;this.frequency=initValue(properties.frequency,this.defaults.frequency.value);this.offset=initValue(properties.offset,this.defaults.offset.value);this.oscillation=initValue(properties.oscillation,this.defaults.oscillation.value);this.phase=initValue(properties.phase,this.defaults.phase.value);this.target=properties.target||{};this.output.onaudioprocess=this.callback(properties.callback||function(){});this.bypass=properties.bypass||this.defaults.bypass.value};Tuna.prototype.LFO.prototype=Object.create(Super,{name:{value:"LFO"},bufferSize:{value:256},sampleRate:{value:44100},defaults:{value:{frequency:{value:1,min:0,max:20,automatable:false,type:FLOAT},offset:{value:.85,min:0,max:22049,automatable:false,type:FLOAT},oscillation:{value:.3,min:-22050,max:22050,automatable:false,type:FLOAT},phase:{value:0,min:0,max:2*Math.PI,automatable:false,type:FLOAT},bypass:{value:false,automatable:false,type:BOOLEAN}}},frequency:{get:function(){return this._frequency},set:function(value){this._frequency=value;this._phaseInc=2*Math.PI*this._frequency*this.bufferSize/this.sampleRate}},offset:{get:function(){return this._offset},set:function(value){this._offset=value}},oscillation:{get:function(){return this._oscillation},set:function(value){this._oscillation=value}},phase:{get:function(){return this._phase},set:function(value){this._phase=value}},target:{get:function(){return this._target},set:function(value){this._target=value}},activate:{value:function(doActivate){if(doActivate){this.output.connect(userContext.destination);if(this.activateCallback){this.activateCallback(doActivate)}}else{this.output.disconnect()}}},callback:{value:function(callback){var that=this;return function(){that._phase+=that._phaseInc;if(that._phase>2*Math.PI){that._phase=0}callback(that._target,that._offset+that._oscillation*Math.sin(that._phase))}}}});Tuna.toString=Tuna.prototype.toString=function(){return"Please visit https://github.com/Theodeus/tuna/wiki for instructions on how to use Tuna.js"}})();