https://github.com/Theodeus/tuna
Tip revision: 7d55eb95515f1aba6f51b2efe26efbd20bd2163a authored by theodeus on 10 September 2021, 09:46:35 UTC
1.0.15
1.0.15
Tip revision: 7d55eb9
tuna.js
/*
Copyright (c) 2012 DinahMoe AB & Oskar Eriksson
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.
*/
/*global module*/
(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 / 1000) : userContext.currentTime,
dur = duration ? ~~(duration / 1000) : 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; // Prevent overriding connect more than once
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) {
// 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));
}
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 >= 1.0) {
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 = 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: 0.1,
min: 0.0001,
max: 1.0,
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);
//don't use makeupGain setter at init to avoid smoothing
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, 0.01);
}
},
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 = 0.6934; // 1 / (10 ^ (((20 * log10(3)) / 3) / 20))
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: 0.4,
min: 0,
max: 0.95,
automatable: false,
type: FLOAT
},
delay: {
value: 0.0045,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
depth: {
value: 0.7,
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 = 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.setTargetAtTime(this._feedback, userContext.currentTime, 0.01);
this.feedbackGainNodeRL.gain.setTargetAtTime(this._feedback, userContext.currentTime, 0.01);
}
},
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);
//don't use makeupGain setter at initialization to avoid smoothing
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: 2000,
automatable: true,
type: FLOAT
},
makeupGain: {
value: 1,
min: 1,
max: 100,
automatable: true,
type: FLOAT
},
attack: {
value: 1,
min: 0,
max: 1000,
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, // 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 = value / 1000;
}
},
makeupGain: {
enumerable: true,
get: function() {
return this.makeupNode.gain;
},
set: function(value) {
this.makeupNode.gain.setTargetAtTime(dbToWAVolume(value), userContext.currentTime, 0.01);
}
}
});
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);
//don't use setters at init to avoid smoothing
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, 0.01);
}
},
highCut: {
get: function() {
return this.filterHigh.frequency;
},
set: function(value) {
this.filterHigh.frequency.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
level: {
get: function() {
return this.output.gain;
},
set: function(value) {
this.output.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
dryLevel: {
get: function() {
return this.dry.gain;
},
set: function(value) {
this.dry.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
wetLevel: {
get: function() {
return this.wet.gain;
},
set: function(value) {
this.wet.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
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;
//don't use setters at init to avoid smoothing
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: 1000,
automatable: false,
type: FLOAT
},
feedback: {
value: 0.45,
min: 0,
max: 0.9,
automatable: true,
type: FLOAT
},
cutoff: {
value: 20000,
min: 20,
max: 20000,
automatable: true,
type: FLOAT
},
wetLevel: {
value: 0.5,
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 / 1000;
}
},
wetLevel: {
enumerable: true,
get: function() {
return this.wet.gain;
},
set: function(value) {
this.wet.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
dryLevel: {
enumerable: true,
get: function() {
return this.dry.gain;
},
set: function(value) {
this.dry.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
feedback: {
enumerable: true,
get: function() {
return this.feedbackNode.gain;
},
set: function(value) {
this.feedbackNode.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
cutoff: {
enumerable: true,
get: function() {
return this.filter.frequency;
},
set: function(value) {
this.filter.frequency.setTargetAtTime(value, userContext.currentTime, 0.01);
}
}
});
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);
//don't use setters for freq and gain at init to avoid smoothing
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: 0.001,
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, 0.01);
}
},
frequency: {
enumerable: true,
get: function() {
return this.filter.frequency;
},
set: function(value) {
this.filter.frequency.setTargetAtTime(value, userContext.currentTime, 0.01);
}
}
});
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);
//don't use setter at init to avoid smoothing
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: 1.0,
automatable: true,
type: FLOAT
}
}
},
gain: {
enumerable: true,
get: function() {
return this.gainNode.gain;
},
set: function(value) {
this.gainNode.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
}
});
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 = 0.0;
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 = 0.35013 * (f * f) * (f * f);
fb = this.resonance * (1.0 - 0.15 * f * f);
length = input.length;
for (i = 0; i < length; i++) {
input[i] -= out4 * fb;
input[i] *= inputFactor;
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 = 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: 0.065,
min: 0.0001,
max: 1.0,
automatable: false,
type: FLOAT
},
resonance: {
value: 3.5,
min: 0.0,
max: 4.0,
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: 0.197,
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: 0.979,
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, 0.01);
}
},
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, 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.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: 0.0,
min: -1.0,
max: 1.0,
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: 0.1,
min: 0,
max: 8,
automatable: false,
type: FLOAT
},
depth: {
value: 0.6,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
feedback: {
value: 0.7,
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, 0.01);
this.feedbackGainNodeR.gain.setTargetAtTime(this._feedback, userContext.currentTime, 0.01);
}
},
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 / 1000;
}
},
delayTimeRight: {
enumerable: true,
get: function() {
return this._delayTimeRight;
},
set: function(value) {
this._delayTimeRight = value;
this.delayRight.delayTime.value = value / 1000;
}
},
wetLevel: {
enumerable: true,
get: function () {
return this.wet.gain;
},
set: function (value) {
this.wet.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
feedback: {
enumerable: true,
get: function () {
return this.feedbackLevel.gain;
},
set: function (value) {
this.feedbackLevel.gain.setTargetAtTime(value, userContext.currentTime, 0.01);
}
},
defaults: {
writable: true,
value: {
delayTimeLeft: {
value: 200,
min: 1,
max: 10000,
automatable: false,
type: INT
},
delayTimeRight: {
value: 400,
min: 1,
max: 10000,
automatable: false,
type: INT
},
feedback: {
value: 0.3,
min: 0,
max: 1,
automatable: true,
type: FLOAT
},
wetLevel: {
value: 0.5,
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: 0.3,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
stereoPhase: {
value: 0,
min: 0,
max: 180,
automatable: false,
type: FLOAT
},
rate: {
value: 5,
min: 0.1,
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();
//Connect AudioNodes
this.activateNode.connect(this.filterBp);
this.filterBp.connect(this.filterPeaking);
this.filterPeaking.connect(this.output);
//Set Properties
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: 0.153,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
excursionOctaves: {
value: 3.3,
min: 1,
max: 6,
automatable: false,
type: FLOAT
},
sweep: {
value: 0.35,
min: 0,
max: 1,
automatable: false,
type: FLOAT
},
resonance: {
value: 19,
min: 1,
max: 100,
automatable: false,
type: FLOAT
},
sensitivity: {
value: -0.5,
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);
//put on the next cycle to let all init properties be set
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: 0.003,
min: 0,
max: 0.5,
automatable: false,
type: FLOAT
},
releaseTime: {
value: 0.5,
min: 0,
max: 0.5,
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();
}
//Instantiate AudioNode
this.input = userContext.createGain();
this.output = userContext.createScriptProcessor(256, 1, 1);
this.activateNode = userContext.destination;
//Set Properties
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: 0.85,
min: 0,
max: 22049,
automatable: false,
type: FLOAT
},
oscillation: {
value: 0.3,
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";
};
})();
