MusicWithJS/index.html at master · apribeiro/MusicWithJS · GitHub

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<html>
    <head>
        <link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">
        <link rel="stylesheet" href="https://code.getmdl.io/1.3.0/material.indigo-pink.min.css">
        <script defer src="https://code.getmdl.io/1.3.0/material.min.js"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/tone/13.0.1/Tone.min.js"></script>
        <script>
            // create a new synth and route the output to master
            const synth = new Tone.MembraneSynth().toMaster();
            let playing = false;

            function playSynth() {
                // play a note with the synth we setup
                synth.triggerAttackRelease("C2", "8n");
            }

            const loop = new Tone.Loop(function(time) {
                //triggered every eighth note.
                synth.triggerAttackRelease("C2", "2n");
                // synth.triggerAttackRelease("E4", "4n");
            }, "2n").start(0);

            function playLoop() {
                if (!playing) {
                    Tone.Transport.start();
                    playing = true;
                } else {
                    Tone.Transport.stop();
                    playing = false;
                }
            }
        </script>
    </head>
    <body>
        <button class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect mdl-button--accent"
            onclick="playSynth()">
            <i class="material-icons">music_note</i>
            Play Synth
        </button>
        <button class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect mdl-button--accent"
            onclick="playLoop()">
            <i class="material-icons">music_note</i>
            Play Loop
        </button>
    </body>
</html>