Tone.js/examples/meter.html

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Meter</title>
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<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="icon" type="image/png" sizes="174x174" href="./favicon.png">
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<script src="https://cdnjs.cloudflare.com/ajax/libs/webcomponentsjs/2.4.3/webcomponents-bundle.js"></script>
<link href="https://fonts.googleapis.com/css?family=Material+Icons&display=block" rel="stylesheet"/>
<script src="../build/Tone.js"></script>
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<script src="./js/tone-ui.js"></script>
<script src="./js/components.js"></script>
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</head>
<body>
<tone-example label="Meter">
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<tone-loader></tone-loader>
<div slot="explanation">
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<a href="https://tonejs.github.io/docs/Meter" target="_blank">Tone.Meter</a>
gives you the level of the incoming signal in decibels.
</div>
<div id="content">
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<tone-play-toggle></tone-play-toggle>
</div>
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</tone-example>
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<script type="text/javascript">
const player = new Tone.Player({
url: "https://tonejs.github.io/audio/berklee/Resonant_FM_laser1.mp3",
loop: true
}).toDestination();
const toneMeter = new Tone.Meter({
channels: 2,
});
player.connect(toneMeter);
meter({
tone: toneMeter,
parent: document.querySelector("#content")
});
ui({
tone: player,
name: "Player",
parent: document.querySelector("#content")
});
// bind the interface
document.querySelector("tone-play-toggle").addEventListener("start", () => player.start());
document.querySelector("tone-play-toggle").addEventListener("stop", () => player.stop());
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</script>
</body>
</html>