music21j-port
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A toolkit for computer-aided musicology, Javascript version
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JavaScript
/*
Copyright (c) 2012 DinahMoe AB
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Bitcrusher & Moog Filter by Zach Denton
*/
// https://developer.mozilla.org/en-US/docs/Web_Audio_API/Porting_webkitAudioContext_code_to_standards_based_AudioContext
// Originally written by Alessandro Saccoia, Chris Coniglio and Oskar Eriksson
(function (window) {
var userContext;
var userInstance;
var Tuna = function (context) {
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());
}
userContext = context;
userInstance = this;
},
version = "0.1",
set = "setValueAtTime",
linear = "linearRampToValueAtTime",
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;
}
},
getValues: {
value: function () {
var result = {};
for(var key in this.defaults) {
result[key] = this[key];
}
return result;
}
},
automate: {
value: function (property, value, duration, startTime) {
var start = startTime ? ~~ (startTime / 1000) : userContext.currentTime,
dur = duration ? ~~ (duration / 1000) : 0,
_is = this.defaults[property],
param = this[property],
method;
if (param) {
if (_is.automatable) {
if (!duration) {
method = set;
} else {
method = linear;
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";
function dbToWAVolume(db) {
return Math.max(0, Math.round(100 * Math.pow(2, db / 6)) / 100);
}
function fmod(x, y) {
// http://kevin.vanzonneveld.net
// + original by: Onno Marsman
// + input by: Brett Zamir (http://brett-zamir.me)
// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// * example 1: fmod(5.7, 1.3);
// * returns 1: 0.5
var tmp, tmp2, p = 0,
pY = 0,
l = 0.0,
l2 = 0.0;
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) {
// toFixed will give an out of bound error so we fix it like this:
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));
}
Tuna.toString = Tuna.prototype.toString = function () {
return "You are running Tuna version " + version + " by Dinahmoe!";
};
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.frequency = properties.frequency || this.defaults.frequency.value;
this.Q = properties.resonance || this.defaults.Q.value;
this.filterType = properties.filterType || this.defaults.filterType.value;
this.gain = properties.gain || this.defaults.gain.value;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Filter.prototype = Object.create(Super, {
name: {
value: "Filter"
},
defaults: {
writable:true,
value: {
frequency: {
value: 800,
min: 20,
max: 22050,
automatable: true
},
Q: {
value: 1,
min: 0.001,
max: 100,
automatable: true
},
gain: {
value: 0,
min: -40,
max: 40,
automatable: true
},
bypass: {
value: true,
automatable: false,
type: BOOLEAN
},
filterType: {
value: 1,
min: 0,
max: 7,
automatable: false,
type: INT
}
}
},
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.value = value;
}
},
frequency: {
enumerable: true,
get: function () {
return this.filter.frequency;
},
set: function (value) {
this.filter.frequency.value = value;
}
}
});
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;
this.processor.onaudioprocess = function (e) {
var input = e.inputBuffer.getChannelData(0),
output = e.outputBuffer.getChannelData(0),
step = Math.pow(1/2, this.bits);
for(var i = 0; i < input.length; i++) {
phaser += this.normfreq;
if (phaser >= 1.0) {
phaser -= 1.0;
last = step * Math.floor(input[i] / step + 0.5);
}
output[i] = last;
}
};
this.bits = properties.bits || this.defaults.bits.value;
this.normfreq = properties.normfreq || this.defaults.normfreq.value;
this.bypass = properties.bypass || false;
};
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: 0.1,
min: 0.0001,
max: 1.0,
automatable: false,
}
}
},
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.makeupGain = properties.makeupGain || this.defaults.makeupGain;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Cabinet.prototype = Object.create(Super, {
name: {
value: "Cabinet"
},
defaults: {
writable:true,
value: {
makeupGain: {
value: 1,
min: 0,
max: 20,
automatable: true
},
bypass: {
value: false,
automatable: false,
type: BOOLEAN
}
}
},
makeupGain: {
enumerable: true,
get: function () {
return this.makeupNode.gain;
},
set: function (value) {
this.makeupNode.gain.value = value;
}
},
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.createDelayNode();
this.delayR = userContext.createDelayNode();
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 = properties.feedback || this.defaults.feedback.value;
this.rate = properties.rate || this.defaults.rate.value;
this.delay = properties.delay || this.defaults.delay.value;
this.depth = properties.depth || this.defaults.depth.value;
this.lfoR.phase = Math.PI / 2;
this.attenuator.gain.value = 0.6934; // 1 / (10 ^ (((20 * log10(3)) / 3) / 20))
this.lfoL.activate(true);
this.lfoR.activate(true);
this.bypass = properties.bypass || false;
};
Tuna.prototype.Chorus.prototype = Object.create(Super, {
name: {
value: "Chorus"
},
defaults: {
writable:true,
value: {
feedback: {
value: 0.4,
min: 0,
max: 0.95,
automatable: false,
},
delay: {
value: 0.0045,
min: 0,
max: 1,
automatable: false,
},
depth: {
value: 0.7,
min: 0,
max: 1,
automatable: false,
},
rate: {
value: 1.5,
min: 0,
max: 8,
automatable: false,
},
bypass: {
value: true,
automatable: false,
type: BOOLEAN
}
}
},
delay: {
enumerable: true,
get: function () {
return this._delay;
},
set: function (value) {
this._delay = 0.0002 * (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.value = this._feedback;
this.feedbackGainNodeRL.gain.value = this._feedback;
}
},
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 = properties.automakeup || this.defaults.automakeup.value;
this.makeupGain = properties.makeupGain || this.defaults.makeupGain.value;
this.threshold = properties.threshold || this.defaults.threshold.value;
this.release = properties.release || this.defaults.release.value;
this.attack = properties.attack || this.defaults.attack.value;
this.ratio = properties.ratio || this.defaults.ratio.value;
this.knee = properties.knee || this.defaults.knee.value;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Compressor.prototype = Object.create(Super, {
name: {
value: "Compressor"
},
defaults: {
writable:true,
value: {
threshold: {
value: -20,
min: -60,
max: 0,
automatable: true
},
release: {
value: 250,
min: 10,
max: 2000,
automatable: true
},
makeupGain: {
value: 1,
min: 1,
max: 100,
automatable: true
},
attack: {
value: 1,
min: 0,
max: 1000,
automatable: true
},
ratio: {
value: 4,
min: 1,
max: 50,
automatable: true
},
knee: {
value: 5,
min: 0,
max: 40,
automatable: true
},
automakeup: {
value: false,
automatable: false,
type: BOOLEAN
},
bypass: {
value: true,
automatable: false,
type: BOOLEAN
}
}
},
computeMakeup: {
value: function () {
var magicCoefficient = 4,
// raise me if the output is too hot
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 / 1000;
}
},
release: {
enumerable: true,
get: function () {
return this.compNode.release;
},
set: function (value) {
this.compNode.release = value / 1000;
}
},
makeupGain: {
enumerable: true,
get: function () {
return this.makeupNode.gain;
},
set: function (value) {
this.makeupNode.gain.value = dbToWAVolume(value);
}
}
});
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.dryLevel = properties.dryLevel || this.defaults.dryLevel.value;
this.wetLevel = properties.wetLevel || this.defaults.wetLevel.value;
this.highCut = properties.highCut || this.defaults.highCut.value;
this.buffer = properties.impulse || "../impulses/ir_rev_short.wav";
this.lowCut = properties.lowCut || this.defaults.lowCut.value;
this.level = properties.level || this.defaults.level.value;
this.filterHigh.type = this.filterHigh.LOWPASS;
this.filterLow.type = this.filterHigh.HIGHPASS;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Convolver.prototype = Object.create(Super, {
name: {
value: "Convolver"
},
defaults: {
writable:true,
value: {
highCut: {
value: 22050,
min: 20,
max: 22050,
automatable: true
},
lowCut: {
value: 20,
min: 20,
max: 22050,
automatable: true
},
dryLevel: {
value: 1,
min: 0,
max: 1,
automatable: true
},
wetLevel: {
value: 1,
min: 0,
max: 1,
automatable: true
},
level: {
value: 1,
min: 0,
max: 1,
automatable: true
}
}
},
lowCut: {
get: function () {
return this.filterLow.frequency;
},
set: function (value) {
this.filterLow.frequency.value = value;
}
},
highCut: {
get: function () {
return this.filterHigh.frequency;
},
set: function (value) {
this.filterHigh.frequency.value = value;
}
},
level: {
get: function () {
return this.output.gain;
},
set: function (value) {
this.output.gain.value = value;
}
},
dryLevel: {
get: function () {
return this.dry.gain
},
set: function (value) {
this.dry.gain.value = value;
}
},
wetLevel: {
get: function () {
return this.wet.gain;
},
set: function (value) {
this.wet.gain.value = value;
}
},
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.createDelayNode();
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.feedback = properties.feedback || this.defaults.feedback.value;
this.wetLevel = properties.wetLevel || this.defaults.wetLevel.value;
this.dryLevel = properties.dryLevel || this.defaults.dryLevel.value;
this.cutoff = properties.cutoff || this.defaults.cutoff.value;
this.filter.type = this.filter.LOWPASS;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Delay.prototype = Object.create(Super, {
name: {
value: "Delay"
},
defaults: {
writable:true,
value: {
delayTime: {
value: 100,
min: 20,
max: 1000,
automatable: false,
},
feedback: {
value: 0.45,
min: 0,
max: 0.9,
automatable: true
},
cutoff: {
value: 20000,
min: 20,
max: 20000,
automatable: true
},
wetLevel: {
value: 0.5,
min: 0,
max: 1,
automatable: true
},
dryLevel: {
value: 1,
min: 0,
max: 1,
automatable: true
}
}
},
delayTime: {
enumerable: true,
get: function () {
return this.delay.delayTime;
},
set: function (value) {
this.delay.delayTime.value = value / 1000;
}
},
wetLevel: {
enumerable: true,
get: function () {
return this.wet.gain;
},
set: function (value) {
this.wet.gain.value = value;
}
},
dryLevel: {
enumerable: true,
get: function () {
return this.dry.gain;
},
set: function (value) {
this.dry.gain.value = value;
}
},
feedback: {
enumerable: true,
get: function () {
return this.feedbackNode.gain;
},
set: function (value) {
this.feedbackNode.gain.value = value;
}
},
cutoff: {
enumerable: true,
get: function () {
return this.filter.frequency;
},
set: function (value) {
this.filter.frequency.value = value;
}
}
});
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 = 0.0;
this.processor.onaudioprocess = function (e) {
var input = e.inputBuffer.getChannelData(0),
output = e.outputBuffer.getChannelData(0),
f = this.cutoff * 1.16,
fb = this.resonance * (1.0 - 0.15 * f * f);
for(var i = 0; i < input.length; i++) {
input[i] -= out4 * fb;
input[i] *= 0.35013 * (f*f)*(f*f);
out1 = input[i] + 0.3 * in1 + (1 - f) * out1; // Pole 1
in1 = input[i];
out2 = out1 + 0.3 * in2 + (1 - f) * out2; // Pole 2
in2 = out1;
out3 = out2 + 0.3 * in3 + (1 - f) * out3; // Pole 3
in3 = out2;
out4 = out3 + 0.3 * in4 + (1 - f) * out4; // Pole 4
in4 = out3;
output[i] = out4;
}
};
this.cutoff = properties.cutoff || this.defaults.cutoff.value;
this.resonance = properties.resonance || this.defaults.resonance.value;
this.bypass = properties.bypass || false;
};
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: 0.065,
min: 0.0001,
max: 1.0,
automatable: false,
},
resonance: {
value: 3.5,
min: 0.0,
max: 4.0,
automatable: false,
}
}
},
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 = properties.drive || this.defaults.drive.value;
this.outputGain = properties.outputGain || this.defaults.outputGain.value;
this.curveAmount = properties.curveAmount || this.defaults.curveAmount.value;
this.algorithmIndex = properties.algorithmIndex || this.defaults.algorithmIndex.value;
this.bypass = properties.bypass || false;
};
Tuna.prototype.Overdrive.prototype = Object.create(Super, {
name: {
value: "Overdrive"
},
defaults: {
writable:true,
value: {
drive: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT,
scaled: true
},
outputGain: {
value: 1,
min: 0,
max: 1,
automatable: true,
type: FLOAT,
scaled: true
},
curveAmount: {
value: 0.725,
min: 0,
max: 1,
automatable: false,
},
algorithmIndex: {
value: 0,
min: 0,
max: 5,
automatable: false,
type: INT
}
}
},
k_nSamples: {
value: 8192
},
drive: {
get: function () {
return this.inputDrive.gain;
},
set: function (value) {
this._drive = 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);
}
},
algorithmIndex: {
get: function () {
return this._algorithmIndex;
},
set: function (value) {
this._algorithmIndex = value>>0;
this.curveAmount = this._curveAmount;
}
},
waveshaperAlgorithms: {
value: [
function (amount, n_samples, ws_table) {
amount = Math.min(amount, 0.9999);
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 = ((0.5 * 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 + 0.04) : Math.pow(x, a);
ws_table[i] = tanh(y * 2);
}
}, function (amount, n_samples, ws_table) {
var i, x, y, abx, a = 1 - amount > 0.99 ? 0.99 : 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) { // fixed curve, amount doesn't do anything, the distortion is just from the drive
var i, x;
for(i = 0; i < n_samples; i++) {
x = i * 2 / n_samples - 1;
if (x < -0.08905) {
ws_table[i] = (-3 / 4) * (1 - (Math.pow((1 - (Math.abs(x) - 0.032857)), 12)) + (1 / 3) * (Math.abs(x) - 0.032847)) + 0.01;
} else if (x >= -0.08905 && x < 0.320018) {
ws_table[i] = (-6.153 * (x * x)) + 3.9375 * x;
} else {
ws_table[i] = 0.630035;
}
}
}, function (amount, n_samples, ws_table) {
var a = 2 + Math.round(amount * 14),
// we go from 2 to 16 bits, keep in mind for the UI
bits = Math.round(Math.pow(2, a - 1)),
// real number of quantization steps divided by 2
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.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 = this.filtersL[i].ALLPASS;
this.filtersR[i].type = this.filtersR[i].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 = properties.rate || this.defaults.rate.value;
this.baseModulationFrequency = properties.baseModulationFrequency || this.defaults.baseModulationFrequency.value;
this.depth = properties.depth || this.defaults.depth.value;
this.feedback = properties.feedback || this.defaults.feedback.value;
this.stereoPhase = properties.stereoPhase || this.defaults.stereoPhase.value;
this.lfoL.activate(true);
this.lfoR.activate(true);
this.bypass = properties.bypass || false;
};
Tuna.prototype.Phaser.prototype = Object.create(Super, {
name: {
value: "Phaser"
},
stage: {
value: 4
},
defaults: {
writable:true,
value: {
rate: {
value: 0.1,
min: 0,
max: 8,
automatable: false,
},
depth: {
value: 0.6,
min: 0,
max: 1,
automatable: false,
},
feedback: {
value: 0.7,
min: 0,
max: 1,
automatable: false,
},
stereoPhase: {
value: 40,
min: 0,
max: 180,
automatable: false,
},
baseModulationFrequency: {
value: 700,
min: 500,
max: 1500,
automatable: false,
}
}
},
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.value = this._feedback;
this.feedbackGainNodeR.gain.value = this._feedback;
}
},
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.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 = properties.intensity || this.defaults.intensity.value;
this.stereoPhase = 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 || false;
};
Tuna.prototype.Tremolo.prototype = Object.create(Super, {
name: {
value: "Tremolo"
},
defaults: {
writable:true,
value: {
intensity: {
value: 0.3,
min: 0,
max: 1,
automatable: false,
},
stereoPhase: {
value: 0,
min: 0,
max: 180,
automatable: false,
},
rate: {
value: 5,
min: 0.1,
max: 11,
automatable: false,
}
}
},
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._rate;
},
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();
//Connect AudioNodes
this.activateNode.connect(this.filterBp);
this.filterBp.connect(this.filterPeaking);
this.filterPeaking.connect(this.output);
//Set Properties
this.init();
this.automode = properties.enableAutoMode || this.defaults.automode.value;
this.resonance = properties.resonance || this.defaults.resonance.value;
this.sensitivity = properties.sensitivity || this.defaults.sensitivity.value;
this.baseFrequency = properties.baseFrequency || this.defaults.baseFrequency.value;
this.excursionOctaves = properties.excursionOctaves || this.defaults.excursionOctaves.value;
this.sweep = properties.sweep || this.defaults.sweep.value;
this.activateNode.gain.value = 2;
this.envelopeFollower.activate(true);
this.bypass = properties.bypass || false;
};
Tuna.prototype.WahWah.prototype = Object.create(Super, {
name: {
value: "WahWah"
},
defaults: {
writable:true,
value: {
automode: {
value: true,
automatable: false,
type: BOOLEAN
},
baseFrequency: {
value: 0.5,
min: 0,
max: 1,
automatable: false,
},
excursionOctaves: {
value: 2,
min: 1,
max: 6,
automatable: false,
},
sweep: {
value: 0.2,
min: 0,
max: 1,
automatable: false,
},
resonance: {
value: 10,
min: 1,
max: 100,
automatable: false,
},
sensitivity: {
value: 0.5,
min: -1,
max: 1,
automatable: false,
}
}
},
activateCallback: {
value: function (value) {
this.automode = value;
}
},
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);
}
}
},
sweep: {
enumerable: true,
get: function () {
return this._sweep.value;
},
set: function (value) {
this._sweep = Math.pow(value > 1 ? 1 : value < 0 ? 0 : value, this._sensitivity);
this.filterBp.frequency.value = this._baseFrequency + this._excursionFrequency * this._sweep;
this.filterPeaking.frequency.value = this._baseFrequency + this._excursionFrequency * this._sweep;
}
},
baseFrequency: {
enumerable: true,
get: function () {
return this._baseFrequency;
},
set: function (value) {
this._baseFrequency = 50 * Math.pow(10, value * 2);
this._excursionFrequency = Math.min(this.sampleRate / 2, this.baseFrequency * Math.pow(2, this._excursionOctaves));
this.filterBp.frequency.value = this._baseFrequency + this._excursionFrequency * this._sweep;
this.filterPeaking.frequency.value = this._baseFrequency + this._excursionFrequency * this._sweep;
}
},
excursionOctaves: {
enumerable: true,
get: function () {
return this._excursionOctaves;
},
set: function (value) {
this._excursionOctaves = value;
this._excursionFrequency = Math.min(this.sampleRate / 2, this.baseFrequency * Math.pow(2, this._excursionOctaves));
this.filterBp.frequency.value = this._baseFrequency + this._excursionFrequency * this._sweep;
this.filterPeaking.frequency.value = this._baseFrequency + this._excursionFrequency * this._sweep;
}
},
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 = this._resonance;
}
},
init: {
value: function () {
this.output.gain.value = 1;
this.filterPeaking.type = 5;
this.filterBp.type = 2;
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;
this.sampleRate = userContext.sampleRate;
}
}
});
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 = properties.attackTime || this.defaults.attackTime.value;
this.releaseTime = properties.releaseTime || this.defaults.releaseTime.value;
this._envelope = 0;
this.target = properties.target || {};
this.callback = properties.callback || function () {};
};
Tuna.prototype.EnvelopeFollower.prototype = Object.create(Super, {
name: {
value: "EnvelopeFollower"
},
defaults: {
value: {
attackTime: {
value: 0.003,
min: 0,
max: 0.5,
automatable: false,
},
releaseTime: {
value: 0.5,
min: 0,
max: 0.5,
automatable: false,
}
}
},
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;
}
}
},
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;
if (channels > 1) { //need to mixdown
for(i = 0; i < count; ++i) {
for(; chan < channels; ++chan) {
current = event.inputBuffer.getChannelData(chan)[i];
rms += (current * current) / channels;
}
}
} else {
for(i = 0; i < count; ++i) {
current = event.inputBuffer.getChannelData(0)[i];
rms += (current * current);
}
}
rms = Math.sqrt(rms);
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);
}
}
});
// Low-frequency oscillation
Tuna.prototype.LFO = function (properties) {
//Instantiate AudioNode
this.output = userContext.createScriptProcessor(256, 1, 1);
this.activateNode = userContext.destination;
//Set Properties
this.frequency = properties.frequency || this.defaults.frequency.value;
this.offset = properties.offset || this.defaults.offset.value;
this.oscillation = properties.oscillation || this.defaults.oscillation.value;
this.phase = properties.phase || this.defaults.phase.value;
this.target = properties.target || {};
this.output.onaudioprocess = this.callback(properties.callback || function () {});
this.bypass = properties.bypass || false;
};
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,
},
offset: {
value: 0.85,
min: 0,
max: 22049,
automatable: false,
},
oscillation: {
value: 0.3,
min: -22050,
max: 22050,
automatable: false,
},
phase: {
value: 0,
min: 0,
max: 2 * Math.PI,
automatable: false,
}
}
},
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.disconnect(userContext.destination);
} else {
this.output.connect(userContext.destination);
}
}
},
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));
};
}
}
});
/* Panner
------------------------------------------------*/
Tuna.prototype.Panner = function (properties) {
if (!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.output = userContext.createGain();
this.panner = userContext.createPanner();
this.activateNode.connect(this.panner);
this.panner.connect(this.output);
this.bypass = properties.bypass || false;
this.x = properties.x || 0;
this.y = properties.y || 1;
this.z = properties.z || 1;
this.panningModel = properties.panningModel || 0;
this.distanceModel = properties.distanceModel || 0;
};
var PannerPosition = function(type) {
return {
enumerable: true,
get: function () {
return this["_" + type];
},
set: function (value) {
this["_" + type] = value;
this.panner.setPosition(this._x || 0, this._y || 0, this._z || 0);
}
}
};
var PannerModel = function(type) {
return {
enumerable: true,
get: function () {
return this["_" + type];
},
set: function (value) {
this["_" + type] = value;
this.panner[type] = value;
}
}
};
var Clamp = function(value, min, max, automatable) {
return {
value: value,
min: min,
max: max,
automatable: automatable
};
};
Tuna.prototype.Panner.prototype = Object.create(Super, {
name: {
value: "Panner"
},
defaults: {
writable:true,
value: {
x: Clamp(0, -20, 20, false),
y: Clamp(0, -20, 20, false),
z: Clamp(0, -20, 20, false),
distanceModel: Clamp(0, 0, 2, false),
panningModel: Clamp(0, 0, 2, false)
}
},
x: PannerPosition("x"),
y: PannerPosition("y"),
z: PannerPosition("z"),
panningModel: PannerModel("panningModel"),
distanceModel: PannerModel("distanceModel")
});
/* Volume
------------------------------------------------*/
Tuna.prototype.Volume = function (properties) {
if (!properties) {
properties = this.getDefaults();
}
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.output = userContext.createGain();
this.activateNode.connect(this.output);
this.bypass = properties.bypass || false;
this.amount = properties.amount || this.defaults.amount.value;
};
Tuna.prototype.Volume.prototype = Object.create(Super, {
name: {
value: "Volume"
},
defaults: {
writable:true,
value: {
amount: Clamp(0, 0, 2, false)
}
},
amount: {
enumerable: true,
get: function () {
return this._volume;
},
set: function (value) {
this._volume = value;
this.activateNode.gain.value = value;
}
}
});
/* Frequency
------------------------------------------------*/
Tuna.prototype.Frequency = function (properties) {
if (!properties) {
properties = this.getDefaults();
}
this.trebleFilter = userContext.createBiquadFilter();
this.trebleFilter.type = this.trebleFilter.HIGHSHELF;
this.trebleFilter.frequency.value = 8000; // 1k+
this.trebleFilter.Q.value = 0;
this.midtoneFilter = userContext.createBiquadFilter();
this.midtoneFilter.type = this.midtoneFilter.PEAKING;
this.midtoneFilter.frequency.value = 1000; // 200-1k
this.midtoneFilter.Q.value = 0;
this.bassFilter = userContext.createBiquadFilter();
this.bassFilter.type = this.bassFilter.LOWSHELF;
this.bassFilter.frequency.value = 200; // 60-200k
this.bassFilter.Q.value = 0;
this.input = userContext.createGain();
this.activateNode = userContext.createGain();
this.output = userContext.createGain();
this.activateNode.connect(this.bassFilter);
this.bassFilter.connect(this.midtoneFilter);
this.midtoneFilter.connect(this.trebleFilter);
this.trebleFilter.connect(this.output);
this.bypass = properties.bypass || false;
this.volume = properties.volume || false;
this.treble = properties.treble || false;
this.midtone = properties.midtone || false;
this.bass = properties.bass || false;
};
var GainValue = function(type, nodeId) {
return {
enumerable: true,
get: function () {
return this["_" + type];
},
set: function (value) {
this["_" + type] = value;
this[nodeId || type + "Filter"].gain.value = value;
}
};
};
Tuna.prototype.Frequency.prototype = Object.create(Super, {
name: {
value: "Frequency"
},
defaults: {
writable:true,
value: {
volume: Clamp(1, 0, 2, false),
treble: Clamp(0, -20, 20, false),
midtone: Clamp(0, -20, 20, false),
bass: Clamp(0, -20, 20, false)
}
},
volume: GainValue("volume", "activateNode"),
treble: GainValue("treble"),
midtone: GainValue("midtone"),
bass: GainValue("bass")
});
if (typeof define === "function") {
define("Tuna", [], function () {
return Tuna;
});
} else {
window.Tuna = Tuna;
}
})(this);