mirror of
https://github.com/Tonejs/Tone.js
synced 2024-12-29 04:53:10 +00:00
71 lines
1.9 KiB
HTML
71 lines
1.9 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<title>Signal Ramping</title>
|
|
|
|
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
|
|
<link rel="icon" type="image/png" sizes="174x174" href="./favicon.png">
|
|
|
|
<script src="https://unpkg.com/@webcomponents/webcomponentsjs@^2/webcomponents-bundle.js"></script>
|
|
<script src="../build/Tone.js"></script>
|
|
<script src="./js/tonejs-ui.js"></script>
|
|
</head>
|
|
<body>
|
|
<style>
|
|
tone-slider {
|
|
width: 100%;
|
|
margin-top: 10px;
|
|
}
|
|
</style>
|
|
<tone-example>
|
|
<tone-explanation label="rampTo">
|
|
Working with signals is different than working with numbers or strings:
|
|
Signals are values which are updated at audio rate,
|
|
which allows for sample-accurate scheduling and ramping. <code>.rampTo(value, rampTime)</code>
|
|
smoothly changes the signal from the current value to the target value over the duration of the rampTime.
|
|
This example uses <code>.rampTo</code> in to smooth out changes in volume and frequency.
|
|
</tone-explanation>
|
|
|
|
<tone-content>
|
|
<tone-play-toggle></tone-play-toggle>
|
|
<tone-slider bare min="0.5" max="2" value="1"></tone-slider>
|
|
</tone-content>
|
|
</tone-example>
|
|
|
|
<script type="text/javascript">
|
|
var oscillators = [];
|
|
|
|
var bassFreq = 32;
|
|
|
|
for (var i = 0; i < 8; i++){
|
|
oscillators.push(new Tone.Oscillator({
|
|
"frequency" : bassFreq * i,
|
|
"type" : "sawtooth10",
|
|
"volume" : -Infinity,
|
|
"detune" : Math.random() * 30 - 15,
|
|
}).toMaster());
|
|
}
|
|
|
|
//bind the interface
|
|
document.querySelector("tone-play-toggle").addEventListener("play", e => {
|
|
oscillators.forEach(o => {
|
|
if (e.detail){
|
|
o.start();
|
|
o.volume.rampTo(0, 1);
|
|
} else {
|
|
o.stop("+1.2");
|
|
o.volume.rampTo(-Infinity, 1);
|
|
}
|
|
});
|
|
});
|
|
|
|
document.querySelector("tone-slider").addEventListener("change", e => {
|
|
oscillators.forEach((osc, i) => {
|
|
osc.frequency.rampTo(bassFreq * i * e.detail, 0.4);
|
|
});
|
|
});
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|