accelerator/synth.html at master · duo-f/accelerator · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Accelerator</title>
  </head>
  <body>

    <audio id='celu_1_0' src="./sounds/celu_1_0.mp3" autoplay loop="true"></audio>
    <audio id='celu_1_1' src="./sounds/celu_1_1.wav" autoplay loop="true"></audio>
    <!-- separator -->
    <audio id='celu_2_0' src="./sounds/celu_2_0.mp3" autoplay loop="true"></audio>
    <audio id='celu_2_1' src="./sounds/celu_2_1.wav" autoplay loop="true"></audio>
    <!-- separator -->
    <audio id='celu_3_0' src="./sounds/celu_3_0.wav" autoplay loop="true"></audio>
    <audio id='celu_3_1' src="./sounds/celu_3_1.mp3" autoplay loop="true"></audio>
    <!-- separator -->


    <script>
      var context;
      var tracks = {};

      var ws = new WebSocket("ws://localhost:9090");
      ws.onmessage = function (e) {
        var data = JSON.parse(e.data);
        // console.log(data.id, tracks[data.id]);
        tracks[data.id].update(data.x, data.y, data.z);
      }


      function Track(a1, a2, f) {
        var audio1 = context.createMediaElementSource(a1);
        var audio2 = context.createMediaElementSource(a2);

        var gain2 = context.createGain();
        var gain1 = context.createGain();
        var master = context.createGain();
        var filter = context.createBiquadFilter();

        //var last = {x: 0, y: 0, z: 0, delta: 0, time: 0};

        function init() {
          a1.loop = true;
          a2.loop = true;

          gain1.gain.value = 0;
          gain2.gain.value = 0;

          filter.type = f.type;
          filter.frequency.value = f.freq;
          filter.Q.value = f.q;

          master.gain.value = f.master || 1;

          audio1.connect(gain1);
          gain1.connect(filter);

          audio2.connect(gain2);
          gain2.connect(filter);

          filter.connect(master);
          master.connect(context.destination);
        }

        function updateGain(z) {
          var gain = z / 20;

          if (gain > 0.5)  { gain = 0.5 };
          if (gain < -0.5) { gain = -0.5 };

          gain1.gain.value = 0.5 + gain;
          gain2.gain.value = 0.5 - gain;
        }

        function updateFilter(y) {
          var d = y;
          if (y > 10)  { d = 10 };
          if (y < -10) { d= -10 };

          var center = f.center;
          var range = f.variation;

          d = center + d * (2 * range / 20);
          filter.detune.value = d;
            console.log(d);
        }

        function updateMaster(x,y,z) {
          var dx = Math.abs(last.x - x);
          var dy = Math.abs(last.y - y);
          var dz = Math.abs(last.z - z);

          var d = dx + dy + dz;

          if (last.delta < 0.2) {
            var gain = master.gain.value - 1 / 60;
            if (gain < 0) { gain = 0 }
          } else {
            var gain = master.gain.value + 1 / 60;
            if (gain > 1) { gain = 1 }
          }

          master.gain.value = gain;

          last.time = context.currentTime;
          last.delta = 0;

          last.x = x;
          last.y = y;
          last.z = z;
          last.delta = last.delta + d / 60;
        }

        function update(x,y,z) {
          updateGain(z);
          updateFilter(y);
          //updateMaster(x,y,z);
        }

        init();

        return { update: update };
      }


    document.addEventListener('DOMContentLoaded', function() {
      try {
        // Fix up for prefixing
        window.AudioContext = window.AudioContext||window.webkitAudioContext;
        context = new AudioContext();
      }
      catch(e) {
        alert('Web Audio API is not supported in this browser');
      }

      tracks['1'] = Track(document.querySelector('#celu_1_0'), document.querySelector('#celu_1_1'), { center: 1000, variation: 1100, type: 'lowpass', q: 15, freq: 1000, master: 0.15 });
      tracks['2'] = Track(document.querySelector('#celu_2_0'), document.querySelector('#celu_2_1'), { center: 800, variation: 1000, type: 'lowpass', q: 5, freq: 800, master: 0.2 });
      tracks['3'] = Track(document.querySelector('#celu_3_0'), document.querySelector('#celu_3_1'), { center: 100, variation: 1000, type: 'bandpass', q: 8, freq: 300 });
    });
    </script>
  </body>
</html>