2015-08-17 00:32:06 +00:00
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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2016-02-18 21:17:45 +00:00
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<title>Phasing</title>
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2015-08-17 00:32:06 +00:00
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
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2015-12-08 05:06:58 +00:00
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<link rel="icon" type="image/png" sizes="174x174" href="./style/favicon.png">
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2015-08-17 00:32:06 +00:00
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<script type="text/javascript" src="../build/Tone.js"></script>
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<script type="text/javascript" src="./scripts/jquery.min.js"></script>
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2015-12-05 19:00:44 +00:00
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<script type="text/javascript" src="./scripts/draggabilly.js"></script>
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<script type="text/javascript" src="./scripts/Logo.js"></script>
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2016-03-04 22:38:32 +00:00
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<script type="text/javascript" src="./scripts/StartAudioContext.js"></script>
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2015-08-17 00:32:06 +00:00
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<script type="text/javascript" src="./scripts/Interface.js"></script>
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<link rel="stylesheet" type="text/css" href="./style/examples.css">
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<script type="text/javascript">
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// jshint ignore: start
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</script>
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</head>
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<body>
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<style type="text/css">
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2015-12-05 19:00:44 +00:00
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#Left, #Right {
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height: 200px;
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width: 50%;
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position: relative;
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float: left;
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margin-top: 5px;
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margin-bottom: 5px;
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2015-08-17 00:32:06 +00:00
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}
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2015-12-05 19:00:44 +00:00
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.Button {
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display: inline-block;
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2015-08-17 00:32:06 +00:00
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}
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</style>
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<div id="Content">
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<div id="Title">Piano Phase</div>
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<div id="Explanation">
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2015-12-05 19:00:44 +00:00
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By slightly slowing down the playbackRate of the Tone.Sequence in the right channel,
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the two identical melodies phase against each other in interesting ways.
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Composition by Steve Reich. Inspiration from Alexander Chen.
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2015-08-17 00:32:06 +00:00
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</div>
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2015-12-05 19:00:44 +00:00
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<canvas id="Left"></canvas>
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<canvas id="Right"></canvas>
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2015-08-17 00:32:06 +00:00
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</div>
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<script type="text/javascript">
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//set the bpm and time signature first
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2015-12-05 19:00:44 +00:00
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Tone.Transport.timeSignature = [6, 4];
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Tone.Transport.bpm.value = 180;
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2015-08-17 00:32:06 +00:00
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//L/R channel merging
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2015-12-05 19:00:44 +00:00
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var merge = new Tone.Merge();
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2015-08-17 00:32:06 +00:00
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2015-12-05 19:00:44 +00:00
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//a little reverb
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var reverb = new Tone.Freeverb({
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2015-08-17 00:32:06 +00:00
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"roomSize" : 0.2,
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"wet" : 0.3
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});
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2015-12-05 19:00:44 +00:00
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merge.chain(reverb, Tone.Master);
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2015-08-17 00:32:06 +00:00
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//the synth settings
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var synthSettings = {
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"oscillator": {
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"detune": 0,
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2015-12-05 19:00:44 +00:00
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"type": "custom",
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"partials" : [2, 1, 2, 2],
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2015-08-17 00:32:06 +00:00
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"phase": 0,
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"volume": 0
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},
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"envelope": {
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"attack": 0.005,
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"decay": 0.3,
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"sustain": 0.2,
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"release": 1,
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},
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"portamento": 0.01,
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"volume": -20
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};
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//left and right synthesizers
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2016-05-23 23:52:56 +00:00
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var synthL = new Tone.Synth(synthSettings).connect(merge.left);
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var synthR = new Tone.Synth(synthSettings).connect(merge.right);
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2015-08-17 00:32:06 +00:00
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//the two Tone.Sequences
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2015-12-05 19:00:44 +00:00
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var partL = new Tone.Sequence(function(time, note){
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2015-08-17 00:32:06 +00:00
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synthL.triggerAttackRelease(note, "8n", time);
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2016-02-18 21:17:45 +00:00
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}, ["E4", "F#4", "B4", "C#5", "D5", "F#4", "E4", "C#5", "B4", "F#4", "D5", "C#5"], "8n").start();
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2015-08-17 00:32:06 +00:00
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2015-12-05 19:00:44 +00:00
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var partR = new Tone.Sequence(function(time, note){
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2015-08-17 00:32:06 +00:00
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synthR.triggerAttackRelease(note, "8n", time);
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2016-02-18 21:17:45 +00:00
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}, ["E4", "F#4", "B4", "C#5", "D5", "F#4", "E4", "C#5", "B4", "F#4", "D5", "C#5"], "8n").start("2m");
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2015-08-17 00:32:06 +00:00
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//set the playback rate of the right part to be slightly slower
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2015-12-05 19:00:44 +00:00
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partR.playbackRate = 0.985;
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2015-08-17 00:32:06 +00:00
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</script>
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<script id="GUI" type="text/javascript">
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$(function(){
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2015-12-05 19:00:44 +00:00
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new Interface.Button({
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key : 32,
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type : "toggle",
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text : "Start",
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activeText : "Stop",
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start : function(){
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Tone.Transport.start();
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},
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end : function(){
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Tone.Transport.stop();
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}
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});
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//draw two circles
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var leftCanvas = $("#Left");
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var rightCanvas = $("#Right");
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var leftContext = leftCanvas.get(0).getContext("2d");
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var rightContext = rightCanvas.get(0).getContext("2d");
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var canvasWidth = leftCanvas.width() * 2;
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var canvasHeight = leftCanvas.height() * 2;
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var radius = Math.min(canvasWidth, canvasHeight);
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function sizeCanvas(){
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canvasWidth = leftCanvas.width() * 2;
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canvasHeight = leftCanvas.height() * 2;
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radius = Math.min(canvasWidth, canvasHeight);
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leftContext.canvas.width = canvasWidth;
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leftContext.canvas.height = canvasHeight;
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rightContext.canvas.width = canvasWidth;
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rightContext.canvas.height = canvasHeight;
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}
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$(window).on("resize", sizeCanvas);
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sizeCanvas();
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var twoPi = Math.PI * 2;
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2015-08-17 00:32:06 +00:00
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function loop(){
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requestAnimationFrame(loop);
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2015-12-05 19:00:44 +00:00
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//draw the left progress
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leftContext.clearRect(0, 0, canvasWidth, canvasHeight);
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leftContext.fillStyle = "#3833ED";
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leftContext.save();
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leftContext.translate(canvasWidth / 2, canvasHeight / 2);
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leftContext.rotate(-Math.PI / 2);
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leftContext.beginPath();
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leftContext.moveTo(0, 0);
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leftContext.arc(0, 0, radius/2, 0, twoPi * partL.progress, false);
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leftContext.fill();
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leftContext.restore();
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//draw the left progress
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rightContext.clearRect(0, 0, canvasWidth, canvasHeight);
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rightContext.fillStyle = "#ED3333";
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rightContext.save();
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rightContext.translate(canvasWidth / 2, canvasHeight / 2);
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rightContext.rotate(-Math.PI / 2);
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rightContext.beginPath();
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rightContext.moveTo(0, 0);
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rightContext.arc(0, 0, radius/2, 0, twoPi * partR.progress, false);
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rightContext.fill();
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rightContext.restore();
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2015-08-17 00:32:06 +00:00
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}
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loop();
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});
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</script>
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</style>
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</body>
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</html>
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