2015-06-27 21:25:01 +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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<title>SIGNAL RAMP</title>
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2015-06-27 22:10:18 +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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2015-06-27 21:25:01 +00:00
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2017-03-18 16:35:37 +00:00
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<script src="../build/Tone.js"></script>
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<script src="./scripts/jquery.min.js"></script>
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<script src="./scripts/draggabilly.js"></script>
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<script src="https://tonejs.github.io/Logo/build/Logo.js"></script>
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<script src="./scripts/StartAudioContext.js"></script>
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<script src="./scripts/Interface.js"></script>
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2015-06-27 21:25:01 +00:00
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<link rel="stylesheet" type="text/css" href="./style/examples.css">
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2017-03-18 16:35:37 +00:00
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<script>
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2015-06-27 21:25:01 +00:00
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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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canvas {
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margin-top: 3px;
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}
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</style>
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2017-08-31 16:41:54 +00:00
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2015-06-27 21:25:01 +00:00
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<div id="Content" class="FullScreen">
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<div id="Title">rampTo</div>
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<div id="Explanation">
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2017-08-31 16:41:54 +00:00
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In Tone.js, many of a class' members are <a href="https://tonejs.github.io/docs/#Signal">Tone.Signals</a>.
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Working with signals is different than working with numbers or strings:
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2015-06-27 22:02:55 +00:00
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Signals are values which are updated at audio rate,
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2015-06-27 21:25:01 +00:00
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which allows for sample-accurate scheduling and ramping. <code>.rampTo(value, rampTime)</code>
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2017-08-31 16:41:54 +00:00
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smoothly changes the signal from the current value to the target value over the duration of the rampTime.
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This example uses <code>.rampTo</code> in to smooth out changes in volume and frequency.
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2015-06-27 21:25:01 +00:00
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</div>
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</div>
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2017-03-18 16:35:37 +00:00
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<script>
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2015-06-27 21:25:01 +00:00
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2017-08-31 16:41:54 +00:00
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var oscillators = [];
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2015-06-27 21:25:01 +00:00
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var bassFreq = 32;
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2015-12-05 18:20:53 +00:00
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for (var i = 0; i < 8; i++){
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2017-08-31 16:41:54 +00:00
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oscillators.push(new Tone.Oscillator({
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2015-06-27 21:25:01 +00:00
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"frequency" : bassFreq * i,
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"type" : "sawtooth10",
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2017-08-31 16:41:54 +00:00
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"volume" : -Infinity,
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2015-06-27 21:25:01 +00:00
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"detune" : Math.random() * 30 - 15,
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2017-08-31 16:41:54 +00:00
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}).start().toMaster());
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2015-06-27 21:25:01 +00:00
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}
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2017-08-31 16:41:54 +00:00
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Interface.Slider({
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name : "harmony",
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min : 0.5,
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max : 2,
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value : 1,
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drag : function(value){
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oscillators.forEach(function(osc, i){
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osc.frequency.rampTo(bassFreq * i * value, 0.4);
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});
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},
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});
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Interface.Button({
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text : "Unmute",
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activeText : "Mute",
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type : "toggle",
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key : 32, //spacebar
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start : function(){
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oscillators.forEach(function(osc){
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osc.volume.rampTo(-20, 1);
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});
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},
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end : function(){
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oscillators.forEach(function(osc){
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osc.volume.rampTo(-Infinity, 1);
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});
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},
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});
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2015-06-27 21:25:01 +00:00
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</script>
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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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