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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

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HTML Settings

Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

HTML

            
              %h1 Click your fingers
%img.t{:src => 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/217233/h8f0qj3aiz811.jpg'}
%img{:src => 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/217233/thanos2.png'}
%img.hide{:src => 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/217233/thanos1.png'}

            
          
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CSS

            
              img {
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    top: 50%;
    transform: translateY(-50%);
}

.t {
    z-index: 120;
    width: 50px;;
    display: none;
    top: 70px
}

h1 {
    position: absolute;
    z-index: 10;
    font-family: georgia;
    text-align: center;
    width: 100%;
}
            
          
!

JS

            
                  var Recording = function(cb){
      var recorder = null;
      var recording = true;
      var audioInput = null;
      var volume = null;
      var audioContext = null;
      var callback = cb;
      navigator.getUserMedia = navigator.getUserMedia    || navigator.webkitGetUserMedia ||
                               navigator.mozGetUserMedia || navigator.msGetUserMedia;
      if(navigator.getUserMedia){
        navigator.getUserMedia({audio:true},
          function(e){ //success
            var AudioContext = window.AudioContext || window.webkitAudioContext;
            audioContext = new AudioContext();
            volume = audioContext.createGain(); // creates a gain node
            audioInput = audioContext.createMediaStreamSource(e); // creates an audio node from the mic stream
            audioInput.connect(volume);// connect the stream to the gain node
            recorder = audioContext.createScriptProcessor(2048, 1, 1);
            recorder.onaudioprocess = function(e){
                if(!recording) return;
                var left = e.inputBuffer.getChannelData(0);
                //var right = e.inputBuffer.getChannelData(1);
                callback(new Float32Array(left));
            };
            volume.connect(recorder);// connect the recorder
            recorder.connect(audioContext.destination);
          },
          function(e){ //failure
            alert('Error capturing audio.');
          }
        );
      } else {
        alert('getUserMedia not supported in this browser.');
      }
    };
    var lastClap = (new Date()).getTime();
    function detectClap(data){
      var t = (new Date()).getTime();
      if(t - lastClap < 200) return false; // TWEAK HERE
      var zeroCrossings = 0, highAmp = 0;
      for(var i = 1; i < data.length; i++){
        if(Math.abs(data[i]) > 0.25) highAmp++; // TWEAK HERE
        if(data[i] > 0 && data[i-1] < 0 || data[i] < 0 && data[i-1] > 0) zeroCrossings++;
      }
      if(highAmp > 20 && zeroCrossings > 30){ // TWEAK HERE
        //console.log(highAmp+' / '+zeroCrossings);
        lastClap = t;
        return true;
      }
      return false;
    }
    var rec = new Recording(function(data){
      if(detectClap(data)){
            $('.hide, .t, h1').toggle();
      }
    });

            
          
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