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30c9915 Jan 8, 2019
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@tambien @therewasaguy @uzerus
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Step Sequencer</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>
<style type="text/css">
tone-transport {
margin-bottom: 10px;
}
</style>
</head>
<body>
<tone-example>
<tone-loader></tone-loader>
<tone-explanation label="Step Sequencer">
<a href="https://tonejs.github.io/docs/Transport">Tone.Transport</a>
is the application-wide timekeeper. It's clock source enables sample-accurate scheduling as well as tempo-curves and automation. This example uses Tone.Sequence to invoke a callback every 16th note.
</tone-explanation>
<tone-content>
<tone-transport></tone-transport>
<tone-step-sequencer></tone-step-sequencer>
</tone-content>
</tone-example>
<script type="text/javascript">
//setup a polyphonic sampler
var keys = new Tone.Players({
"A" : "./audio/casio/A1.[mp3|ogg]",
"C#" : "./audio/casio/Cs2.[mp3|ogg]",
"E" : "./audio/casio/E2.[mp3|ogg]",
"F#" : "./audio/casio/Fs2.[mp3|ogg]",
}, {
"volume" : -10,
"fadeOut" : "64n",
}).toMaster();
//the notes
var noteNames = ["F#", "E", "C#", "A"];
var loop = new Tone.Sequence(function(time, col){
var column = document.querySelector("tone-step-sequencer").currentColumn;
column.forEach(function(val, i){
if (val){
//slightly randomized velocities
var vel = Math.random() * 0.5 + 0.5;
keys.get(noteNames[i]).start(time, 0, "32n", 0, vel);
}
});
//set the columne on the correct draw frame
Tone.Draw.schedule(function(){
document.querySelector("tone-step-sequencer").setAttribute("highlight", col);
}, time);
}, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], "16n").start(0);
//bind the interface
document.querySelector("tone-transport").bind(Tone.Transport);
Tone.Transport.on("stop", () => {
setTimeout(() => {
document.querySelector("tone-step-sequencer").setAttribute("highlight", "-1");
}, 100);
});
</script>
</body>
</html>