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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2019-01-09 01:21:29 +00:00
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
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<link rel="icon" type="image/png" sizes="174x174" href="./favicon.png">
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2015-08-17 00:32:06 +00:00
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2019-01-09 01:21:29 +00:00
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<script src="https://unpkg.com/@webcomponents/webcomponentsjs@^2/webcomponents-bundle.js"></script>
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2020-07-18 00:36:42 +00:00
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<link href="https://fonts.googleapis.com/css?family=Material+Icons&display=block" rel="stylesheet"/>
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2019-01-09 01:21:29 +00:00
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<script src="../build/Tone.js"></script>
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2020-07-18 00:36:42 +00:00
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<script src="../../examples/dist/tone-gui.js"></script>
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<script src="../../examples/dist/components.js"></script>
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2015-08-17 00:32:06 +00:00
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</head>
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2019-01-09 01:21:29 +00:00
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<body>
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2015-08-17 00:32:06 +00:00
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<style type="text/css">
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2019-01-09 01:21:29 +00:00
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#loop {
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margin-bottom: 10px;
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display: flex;
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2015-08-17 00:32:06 +00:00
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}
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#loop .bar {
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flex-grow: 1;
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width: 40%;
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2020-07-18 00:36:42 +00:00
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height: 20px;
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margin: 10px;
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background-color: #ececec;
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border-radius: 4px;
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overflow: hidden;
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position: relative;
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}
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#loop .bar .fill {
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height: 100%;
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width: 50%;
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background-color:#7F33ED;
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position: absolute;
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left: 50%;
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transform: translate(-50%, 0);
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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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2020-07-18 00:36:42 +00:00
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<tone-example label="Piano Phase">
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<div slot="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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2019-01-09 01:21:29 +00:00
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<br><br>
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2015-12-05 19:00:44 +00:00
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Composition by Steve Reich. Inspiration from Alexander Chen.
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</div>
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<div id="content">
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<div id="loop">
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<div class="bar">
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<div class="fill" id="left"></div>
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</div>
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<div class="bar">
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<div class="fill" id="right"></div>
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</div>
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</div>
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<tone-play-toggle></tone-play-toggle>
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</div>
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</tone-example>
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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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// L/R channel merging
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const merge = new Tone.Merge();
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2020-07-18 00:36:42 +00:00
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// a little reverb
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const reverb = new Tone.Reverb({
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wet: 0.3
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});
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merge.chain(reverb, Tone.Destination);
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2015-08-17 00:32:06 +00:00
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2020-07-18 00:36:42 +00:00
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// the synth settings
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const synthSettings = {
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oscillator: {
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detune: 0,
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type: "custom",
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partials: [2, 1, 2, 2],
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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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2020-07-18 00:36:42 +00:00
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// left and right synthesizers
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const synthL = new Tone.Synth(synthSettings).connect(merge, 0, 0);
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const synthR = new Tone.Synth(synthSettings).connect(merge, 0, 1);
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2015-08-17 00:32:06 +00:00
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2020-07-18 00:36:42 +00:00
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// the two Tone.Sequences
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const partL = new Tone.Sequence(((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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2020-07-18 00:36:42 +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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2020-07-18 00:36:42 +00:00
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const partR = new Tone.Sequence(((time, note) => {
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synthR.triggerAttackRelease(note, "8n", time);
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2020-07-18 00:36:42 +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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// set the playback rate of the right part to be slightly slower
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partR.playbackRate = 0.985;
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2015-08-17 00:32:06 +00:00
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2020-07-18 00:36:42 +00:00
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//bind the interface
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document.querySelector('tone-play-toggle').addEventListener('start', () => Tone.Transport.start())
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document.querySelector('tone-play-toggle').addEventListener('stop', () => Tone.Transport.stop())
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// update the width of the fill bars to reflect the left and right progress
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function progressToWidth(progress){
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progress = Math.cos(progress * Math.PI * 2 + Math.PI)
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progress = (progress + 1) / 2
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return `${progress * 100}%`
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}
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function loop(){
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requestAnimationFrame(loop)
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// make it go out and back for each loop
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document.querySelector("#left").style.width = progressToWidth(partL.progress)
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document.querySelector("#right").style.width = progressToWidth(partR.progress)
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}
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loop()
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// document.querySelector("#left").bind(partL);
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// document.querySelector("#right").bind(partR);
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/*// GUI //
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2015-12-05 19:00:44 +00:00
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2017-03-26 20:39:19 +00:00
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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("+0.1");
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},
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end : function(){
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Tone.Transport.stop();
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2015-08-17 00:32:06 +00:00
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}
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});
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2017-03-26 20:39:19 +00:00
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//draw two circles
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var leftCanvas = $("#Left");
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var rightCanvas = $("#Right");
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var leftContext = leftCanvas.get(0).getContext("2d");
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var rightContext = rightCanvas.get(0).getContext("2d");
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var canvasWidth = leftCanvas.width() * 2;
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var canvasHeight = leftCanvas.height() * 2;
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var radius = Math.min(canvasWidth, canvasHeight);
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function sizeCanvas(){
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canvasWidth = leftCanvas.width() * 2;
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canvasHeight = leftCanvas.height() * 2;
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radius = Math.min(canvasWidth, canvasHeight) * 0.8;
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leftContext.canvas.width = canvasWidth;
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leftContext.canvas.height = canvasHeight;
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rightContext.canvas.width = canvasWidth;
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rightContext.canvas.height = canvasHeight;
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}
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$(window).on("resize", sizeCanvas);
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sizeCanvas();
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var twoPi = Math.PI * 2;
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function loop(){
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requestAnimationFrame(loop);
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leftContext.lineWidth = radius * 0.1;
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rightContext.lineWidth = radius * 0.1;
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//draw the left progress
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leftContext.clearRect(0, 0, canvasWidth, canvasHeight);
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leftContext.strokeStyle = "#7F33ED";
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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.arc(0, 0, radius/2, 0, twoPi * partL.progress, false);
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leftContext.stroke();
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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.strokeStyle = "#1EDF3E";
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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.arc(0, 0, radius/2, 0, twoPi * partR.progress, false);
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rightContext.stroke();
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rightContext.restore();
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}
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2019-01-09 01:21:29 +00:00
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loop();*/
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2017-03-26 20:39:19 +00:00
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</script>
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2015-08-17 00:32:06 +00:00
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</body>
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2017-03-18 16:35:37 +00:00
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</html>
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