mirror of
https://github.com/Tonejs/Tone.js
synced 2024-12-27 03:53:07 +00:00
168 lines
No EOL
4 KiB
HTML
168 lines
No EOL
4 KiB
HTML
<html>
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<head>
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<title>STEP SEQUENCER</title>
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<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
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<script type="text/javascript" src="./deps/jquery.min.js"></script>
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<script type="text/javascript" src="./deps/jquery-ui.js"></script>
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<script type="text/javascript" src="./deps/jquery.ui.touch-punch.js"></script>
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<script type="text/javascript" src="../build/Tone.js"></script>
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<script type="text/javascript" src="./Widgets.js"></script>
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<script type="text/javascript" src="./ExampleList.js"></script>
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<link rel="stylesheet" type="text/css" href="./style/widgets.css">
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<link rel="stylesheet" type="text/css" href="./style/jquery-ui.css">
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</head>
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<body>
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<div id="Container">
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<div id="Explanation">
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Tone.Transport
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<br>
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<br>
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Tone.Transport is the application-wide timekeeper. It uses an OscillatorNode
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as it's clock source which enables sample-accurate scheduling as well as
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tempo-curves and automation. This example uses Tone.Transport.setInterval
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to invoke a callback every 16th note.
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</div>
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<div id="Content">
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<div id="Loading">LOADING...</div>
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<div id = "StartButton"></div>
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<div id = "Sequencer"></div>
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</div>
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<script type="text/javascript">
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/* globals Tone, GUI */
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var keys = new Tone.MultiSampler({
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"A" : "./audio/casio/A1.mp3",
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"C#" : "./audio/casio/Cs2.mp3",
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"E" : "./audio/casio/E2.mp3",
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"F#" : "./audio/casio/Fs2.mp3",
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}, function(){
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$("#Loading").remove();
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startCheckbox.enable();
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});
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keys.toMaster();
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var stepNumber = 0;
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var noteNames = ["A", "C#", "E", "F#"];
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var checkboxes = [];
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var indicators = [];
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Tone.Transport.setLoopEnd("1m");
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Tone.Transport.loop = true;
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Tone.Transport.setInterval(function(time){
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//remove the old indicator
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$(".Lit").removeClass("Lit");
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//light up the new one
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indicators[stepNumber].addClass("Lit");
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stepNumber++;
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stepNumber = stepNumber % 16;
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//get the current column
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for (var i = 0; i < checkboxes.length; i++){
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var box = checkboxes[i][stepNumber];
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if (box.isChecked()){
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keys.triggerAttack(noteNames[i], time);
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}
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}
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}, "16n");
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// GUI //
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var sequencer = $("#Sequencer");
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//the indicator of the beat
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function makeIndicator(){
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for (var beat = 0; beat < 16; beat++){
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var indicator = $("<div>", {"class" : "Indicator"}).appendTo(sequencer);
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indicators.push(indicator);
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}
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sequencer.append("<br><br>");
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}
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//1 row for each instrument
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//16 beats in each row
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function makeCheckboxes(){
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for (var row = 0; row < 4; row++){
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checkboxes[row] = [];
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for (var beat = 0; beat < 16; beat++){
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var checkbox = new GUI.Checkbox(sequencer, function(){}, "", "");
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checkboxes[row].push(checkbox);
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//randomly set some as checked initially
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if (Math.random() < 0.25){
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checkbox.check(true);
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}
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}
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sequencer.append("<br>");
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}
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}
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new GUI.TopBar(Tone);
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var startButton = $("#StartButton");
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var startCheckbox = new GUI.Checkbox(startButton, function(on){
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if (on){
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Tone.Transport.start();
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} else {
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Tone.Transport.stop();
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}
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}, "start", "stop");
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startCheckbox.disable();
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makeIndicator();
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makeCheckboxes();
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var slider = new GUI.Slider($("#Content"), function(val){
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var scaled = val * 30 + 100;
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Tone.Transport.setBpm(scaled);
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return scaled;
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}, 120, "tempo");
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slider.render(20/30);
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</script>
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<style type="text/css">
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#Content {
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width: 470px;
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}
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#Content #Sequencer .Checkbox{
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margin-top: 0px;
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width: 25px;
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height: 25px;
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}
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#Content #Sequencer .Checkbox .ui-button-text {
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height: 100%;
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width: 100%;
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padding: 0px;
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}
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#Content #Sequencer .Indicator{
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position: relative;
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float: left;
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width: 25px;
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height: 25px;
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border-radius: 50%;
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margin: 1.5px;
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background-color: yellow;
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opacity: 0;
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transition: opacity 0.1s;
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}
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#Content #Sequencer .Indicator.Lit{
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opacity: 1;
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}
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.Slider {
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margin-top: 20px;
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width: 60%;
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margin-left: 20%;
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}
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#Content #StartButton {
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margin-bottom: 10px;
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width: 60%;
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margin-left: 20%;
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}
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#Content #StartButton .Checkbox{
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width: 100%;
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}
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</style>
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</body>
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</html> |