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oscillator.html
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oscillator.html
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<!--
Copyright 2012, Google Inc.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>
Title
</title>
<link rel="stylesheet" type="text/css" href = "style/simple.css" />
<!-- WebGL stuff -->
<script src="visualizer-gl/o3djs/base.js"></script>
<script src="visualizer-gl/cameracontroller.js"></script>
<!-- TODO(kbr): remove this dependency -->
<script src="visualizer-gl/moz/matrix4x4.js"></script>
<!-- Visualizer GL library -->
<script type="text/javascript" src="visualizer-gl/visualizer.js"></script>
<!-- Slider stuff -->
<script type="text/javascript" src="lib/events.js"></script>
<script type="text/javascript" src="lib/knob.js"></script>
<style type="text/css">
#slider { margin: 10px; }
</style>
<!-- Our javascript code -->
<script type="text/javascript">
o3djs.require('o3djs.shader');
window.onload = init;
var context;
var synthNote;
var wavetable;
var frequencyData;
var analyser;
var analyserView1;
var views;
var FREQ1 = 40;
var FREQ2 = 40;
var FREQ3 = 80;
var FILTERCUTOFF = 24000;
var RESONANCE = 3;
//----------------------------------------------------------------------------------------------------
function SynthNote() {
this.detune = 0;
this.snapToDetune = 0;
this.resonance = RESONANCE;
var osc1 = context.createOscillator();
var osc2 = context.createOscillator();
var osc3 = context.createOscillator();
osc1.frequency.value = FREQ1;
osc2.frequency.value = FREQ2;
osc3.frequency.value = FREQ3;
osc1.noteOn(0);
osc2.noteOn(0);
osc3.noteOn(0);
var noiseSource1 = createRandomPitchSource();
var noiseSource2 = createRandomPitchSource();
var noiseSource3 = createRandomPitchSource();
noiseSource1.connect(osc1.frequency);
noiseSource2.connect(osc2.frequency);
noiseSource3.connect(osc3.frequency);
var gainNode = context.createGainNode();
gainNode.gain.value = 0.25;
var resonanceGainNode = context.createGainNode();
var filter = context.createBiquadFilter();
filter.Q.value = this.resonance ;
filter.frequency.value = FILTERCUTOFF;
var filter2 = context.createBiquadFilter();
filter2.Q.value = this.resonance;
filter2.frequency.value = FILTERCUTOFF;
filter.connect(filter2);
filter2.connect(gainNode);
gainNode.connect(resonanceGainNode);
resonanceGainNode.connect(analyser);
var dest = filter;
osc1.connect(dest);
osc2.connect(dest);
osc3.connect(dest);
//
this.osc1 = osc1;
this.osc2 = osc2;
this.osc3 = osc3;
this.noiseSource1 = noiseSource1;
this.noiseSource2 = noiseSource2;
this.noiseSource3 = noiseSource3;
this.gainNode = gainNode;
this.resonanceGainNode = resonanceGainNode;
this.filter = filter;
this.filter2 = filter2;
}
SynthNote.prototype.setFrequency1 = function(value) {
this.osc1.frequency.value = value;
}
SynthNote.prototype.setFrequency2 = function(value) {
this.osc2.frequency.value = value;
}
SynthNote.prototype.setFrequency3 = function(value) {
this.osc3.frequency.value = value;
}
SynthNote.prototype.setDetune = function(value) {
this.detune = value;
this.snapToDetune = 20
}
SynthNote.prototype.setFilterFrequency = function(value) {
this.filter.frequency.value = value;
this.filter2.frequency.value = value
}
SynthNote.prototype.setFilterResonance = function(value) {
this.filter.Q.value = value;
this.filter2.Q.value = value - 6;
// Resonance gain compensation.
var gain = Math.pow(10, -value * 0.05);
this.resonanceGainNode.gain.setTargetValueAtTime(gain, 0, 0.020);
}
SynthNote.prototype.setRandomization = function(value) {
this.noiseSource1.gain.value = 0.01*value * this.osc1.frequency.value;
this.noiseSource2.gain.value = 0.01*value * this.osc2.frequency.value;
this.noiseSource3.gain.value = 0.01*value * this.osc3.frequency.value;
}
SynthNote.prototype.setGain = function(value) {
this.gainNode.gain.value = value
}
SynthNote.prototype.handleDetune = function() {
var t = 0; //context.currentTime;
var maxDetune = 50; //1200;
// var d1 = (2*Math.random() - 1) * 0.5*maxDetune;
// var d2 = (2*Math.random() - 1) * 0.5*maxDetune;
// var d3 = (2*Math.random() - 1) * 0.5*maxDetune;
var d1 = 0;
var d2 = 0;
var d3 = 0;
var k = 1;
if (this.snapToDetune > 0) {
k = 0.010;
d1 = 0;
d2 = 0;
d3 = 0;
--this.snapToDetune;
}
this.osc1.detune.setTargetValueAtTime(this.detune + d1, t, k);
this.osc2.detune.setTargetValueAtTime(this.detune + d2, t, k);
this.osc3.detune.setTargetValueAtTime(this.detune + d3, t, k);
}
function createNoiseBuffer() {
var n = 5 * context.sampleRate;
var buffer = context.createBuffer(1, n, context.sampleRate);
var p = buffer.getChannelData(0);
for (var i = 0; i < n; ++i) {
var x = 2*Math.random() - 1;
p[i] = x;
}
return buffer;
}
function createRandomPitchSource() {
var noiseBuffer = createNoiseBuffer();
var noiseSource = context.createBufferSource();
noiseSource.buffer = noiseBuffer;
noiseSource.loop = true;
var cutoff = 1;
var noiseLowpass = context.createBiquadFilter();
noiseLowpass.frequency.value = cutoff;
noiseLowpass.frequency.Q = 0;
var noiseGain = context.createGainNode();
noiseGain.gain.value = 1;
noiseSource.connect(noiseLowpass);
noiseLowpass.connect(noiseGain);
noiseSource.noteOn(0);
return noiseGain;
}
function initAudio() {
context = new AudioContext();
//
analyser = context.createAnalyser();
analyser.fftSize = 2048;
analyser.connect(context.destination);
synthNote = new SynthNote();
var controls = document.getElementById("controls");
views = new Array();
var j = 0;
views[j++] = new KnobView("pitch1", FREQ1, 10, 24000, UNITS.hertz, 0, true, function(value) { synthNote.setFrequency1(value); } );
views[j++] = new KnobView("pitch2", FREQ2, 10, 24000, UNITS.hertz, 0, true, function(value) { synthNote.setFrequency2(value); } );
views[j++] = new KnobView("pitch3", FREQ3, 10, 24000, UNITS.hertz, 0, true, function(value) { synthNote.setFrequency3(value); } );
views[j++] = new KnobView("detune", 0, -2400, 2400, UNITS.cents, 0, false, function(value) { synthNote.setDetune(value); } );
views[j++] = new KnobView("filter", FILTERCUTOFF, 30, 24000, UNITS.hertz, 0, true, function(value) { synthNote.setFilterFrequency(value); } );
views[j++] = new KnobView("resonance", RESONANCE, 0, 40, UNITS.decibels, 0, false, function(value) { synthNote.setFilterResonance(value); } );
views[j++] = new KnobView("randomization", 1, 0, 100, UNITS.percent, 0, false, function(value) { synthNote.setRandomization(value); } );
views[j++] = new KnobView("gain", 0.15, 0, 1, UNITS.generic, 0, false, function(value) { synthNote.setGain(value); } );
installViews(views, controls);
loadWaveTable("wave-tables/Phoneme_ah");
//
// 01_Saw
// 02_Triangle
// 03_Square
// 04_Noise
// 05_Pulse
// 06_Warm_Saw
// 07_Warm_Triangle
// 08_Warm_Square
// 09_Dropped_Saw
// 10_Dropped_Square
// 11_TB303_Square
// Bass
// Bass_Amp360
// Bass_Fuzz
// Bass_Fuzz_ 2
// Bass_Sub_Dub
// Bass_Sub_Dub_2
// Brass
// Brit_Blues
// Brit_Blues_Driven
// Buzzy_1
// Buzzy_2
// Celeste
// Chorus_Strings
// Dissonant Piano
// Dissonant_1
// Dissonant_2
// Dyna_EP_Bright
// Dyna_EP_Med
// Ethnic_33
// Full_1
// Full_2
// Guitar_Fuzz
// Harsh
// Mkl_Hard
// Organ_2
// Organ_3
// Phoneme_ah
// Phoneme_bah
// Phoneme_ee
// Phoneme_o
// Phoneme_ooh
// Phoneme_pop_ahhhs
// Piano
// Putney_Wavering
// Throaty
// Trombone
// Twelve String Guitar 1
// Twelve_OpTines
// Wurlitzer
// Wurlitzer_2
}
function init() {
analyserView1 = new AnalyserView("view1");
initAudio();
analyserView1.initByteBuffer();
analyserView1.setAnalysisType(ANALYSISTYPE_WAVEFORM);
draw();
}
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
if ( !window.requestAnimationFrame ) {
window.requestAnimationFrame = ( function() {
return window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame || // comment out if FF4 is slow (it caps framerate at ~30fps: https://bugzilla.mozilla.org/show_bug.cgi?id=630127)
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( /* function FrameRequestCallback */ callback, /* DOMElement Element */ element ) {
window.setTimeout( callback, 1000 / 60 );
};
} )();
}
function draw() {
analyserView1.doFrequencyAnalysis();
synthNote.handleDetune();
window.requestAnimationFrame(draw);
}
function loadWaveTable(url) {
var request = new XMLHttpRequest();
request.open("GET", url, true);
request.onload = function() {
// Get the frequency-domain waveform data.
var f = eval('(' + request.responseText + ')');
// Copy into more efficient Float32Arrays.
var n = f.real.length;
frequencyData = { "real": new Float32Array(n), "imag": new Float32Array(n) };
for (var i = 0; i < n; ++i) {
frequencyData.real[i] = f.real[i];
frequencyData.imag[i] = f.imag[i];
}
wavetable = context.createWaveTable(frequencyData.real, frequencyData.imag);
synthNote.osc1.setWaveTable(wavetable);
synthNote.osc2.setWaveTable(wavetable);
synthNote.osc3.setWaveTable(wavetable);
console.log("loaded wavetable");
};
request.onerror = function() {
alert("error loading: " + url);
};
request.send();
}
</script>
</head>
<body>
<!-- Sliders and other controls will be added here -->
<div id="controls"> </div>
<!-- Canvas tag for WebGL output -->
<canvas id="view1" width="1280px" height="800px"></canvas>
<br>
<!-- Analyser type -->
<input type="radio" name="radioSet" value="data" onMouseDown="analyserView1.setAnalysisType(ANALYSISTYPE_FREQUENCY);" />
Frequency
<input type="radio" name="radioSet" value="data" onMouseDown="analyserView1.setAnalysisType(ANALYSISTYPE_SONOGRAM);" />
Sonogram
<input type="radio" name="radioSet" value="data" checked="checked" onMouseDown="analyserView1.setAnalysisType(ANALYSISTYPE_3D_SONOGRAM);" />
3D Sonogram
<input type="radio" name="radioSet" value="data" onMouseDown="analyserView1.setAnalysisType(ANALYSISTYPE_WAVEFORM);"/>
Waveform
<br>
<!-- Waveform type -->
<input type="radio" name="Waveform1" value="data" onMouseDown="synthNote.osc1.type = 'sine';" />
SINE
<input type="radio" name="Waveform1" value="data" onMouseDown="synthNote.osc1.type = 'square';" />
SQUARE
<input type="radio" name="Waveform1" value="data" checked="checked" onMouseDown="synthNote.osc1.type = 'sawtooth';" />
SAWTOOTH
<input type="radio" name="Waveform1" value="data" onMouseDown="synthNote.osc1.type = 'triangle';"/>
TRIANGLE
<br>
<!-- Waveform type -->
<input type="radio" name="Waveform2" value="data" onMouseDown="synthNote.osc2.type = 'sine';" />
SINE
<input type="radio" name="Waveform2" value="data" onMouseDown="synthNote.osc2.type = 'square';" />
SQUARE
<input type="radio" name="Waveform2" value="data" checked="checked" onMouseDown="synthNote.osc2.type = 'sawtooth';" />
SAWTOOTH
<input type="radio" name="Waveform2" value="data" onMouseDown="synthNote.osc2.type = 'triangle';"/>
TRIANGLE
<br>
<!-- Waveform type -->
<input type="radio" name="Waveform3" value="data" onMouseDown="synthNote.osc3.type = 'sine';" />
SINE
<input type="radio" name="Waveform3" value="data" onMouseDown="synthNote.osc3.type = 'square';" />
SQUARE
<input type="radio" name="Waveform3" value="data" checked="checked" onMouseDown="synthNote.osc3.type = 'sawtooth';" />
SAWTOOTH
<input type="radio" name="Waveform3" value="data" onMouseDown="synthNote.osc3.type = 'triangle';"/>
TRIANGLE
<!--
// Celeste
// Full_1
// Organ_2
// Phoneme_ah
// Twelve String Guitar 1
// Wurlitzer
-->
</body>
</html>