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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

            
              <a id="btStartAudioVisualization" class="bt">Start Audio Visualization</a>
            
          
!

CSS

            
              html, body, div {
  margin: 0;
  padding: 0;
  border: 0;
}
body {
  overflow: hidden;
  background-color:#000;
}
.bt {
	-moz-box-shadow:inset 0px 1px 0px 0px #54a3f7;
	-webkit-box-shadow:inset 0px 1px 0px 0px #54a3f7;
	box-shadow:inset 0px 1px 0px 0px #54a3f7;
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #007dc1), color-stop(1, #0061a7));
	background:-moz-linear-gradient(top, #007dc1 5%, #0061a7 100%);
	background:-webkit-linear-gradient(top, #007dc1 5%, #0061a7 100%);
	background:-o-linear-gradient(top, #007dc1 5%, #0061a7 100%);
	background:-ms-linear-gradient(top, #007dc1 5%, #0061a7 100%);
	background:linear-gradient(to bottom, #007dc1 5%, #0061a7 100%);
	background-color:#007dc1;
	-moz-border-radius:3px;
	-webkit-border-radius:3px;
	border-radius:3px;
	border:1px solid #124d77;
	display:inline-block;
	cursor:pointer;
	color:#ffffff;
	font-family:Arial;
	font-size:13px;
	padding:6px 24px;
	text-decoration:none;
	text-shadow:0px 1px 0px #154682;
}
.bt:hover {
	background:-webkit-gradient(linear, left top, left bottom, color-stop(0.05, #0061a7), color-stop(1, #007dc1));
	background:-moz-linear-gradient(top, #0061a7 5%, #007dc1 100%);
	background:-webkit-linear-gradient(top, #0061a7 5%, #007dc1 100%);
	background:-o-linear-gradient(top, #0061a7 5%, #007dc1 100%);
	background:-ms-linear-gradient(top, #0061a7 5%, #007dc1 100%);
	background:linear-gradient(to bottom, #0061a7 5%, #007dc1 100%);
	background-color:#0061a7;
}
.bt:active {
	position:relative;
	top:1px;
}
#btStartAudioVisualization {
  position: absolute;
  top: 10px;
  left: 10px;
}
            
          
!

JS

            
              /*
Atlantis by Audionautix (http://audionautix.com) is part of the YouTube Audio Library (https://www.youtube.com/audiolibrary/music) and it's licensed under a Creative Commons license (https://creativecommons.org/licenses/by/3.0/deed.en_US).
*/
//---

var audio, audioContext, audioSrc;
var analyser, analyserBufferLength;

//---

var w;
var h;

var center2D;

var btStart;
var canvas;
var context;

var imageData;
var data;

var mouseActive = false;
var mouseDown = false;
var mousePos = { x:0, y:0 };

var fov = 250;

var speed = 0.25;
var speedMin = speed;
var speedMax = 2;

var particles = [];
var particlesSky = [];
var particleDistanceTop = 10;

//---

function init() {

  canvas = document.createElement( 'canvas' );
  canvas.addEventListener( 'mousedown', mouseDownHandler, false );
  canvas.addEventListener( 'mousemove', mouseMoveHandler, false );
  canvas.addEventListener( 'mouseenter', mouseEnterHandler, false ); 
  canvas.addEventListener( 'mouseleave', mouseLeaveHandler, false ); 

  document.body.appendChild( canvas );

  context = canvas.getContext( '2d' );

	window.addEventListener( 'resize', onResize );
  
  onResize();

  addParticles( particles, 1 );
  addParticles( particlesSky, -1 );
  
  render();
  render();

  context.putImageData( imageData, 0, 0 );
  
	btStart = document.getElementById( 'btStartAudioVisualization' );
  btStart.addEventListener( 'mousedown', userStart, false );

};

//---

function userStart() {

	btStart.removeEventListener( 'mousedown', userStart );
  btStart.style.display = 'none';

	audioSetup();
	animate();

};

//---

function audioSetup() {

	audio = new Audio();
  audio.src = 'http://nkunited.de/ExternalImages/jsfiddle/audio/Atlantis-Audionautix-_192kbit_AAC_.mp3';
  audio.controls = false;
  audio.loop = true;
  audio.autoplay = true;
  audio.crossOrigin = 'anonymous';

  audioContext = new ( window.AudioContext || window.webkitAudioContext )();

  analyser = audioContext.createAnalyser();
  analyser.connect( audioContext.destination );
  analyser.smoothingTimeConstant = 0.75;
  analyser.fftSize = 512 * 32;//circleSegments * 32;
  analyserBufferLength = analyser.frequencyBinCount;

  audioSrc = audioContext.createMediaElementSource( audio ); 
  audioSrc.connect( analyser );

};

//---

function clearImageData() {

    for ( var i = 0, l = data.length; i < l; i += 4 ) {

        data[ i ] = 0;
        data[ i + 1 ] = 0;
        data[ i + 2 ] = 0;
        data[ i + 3 ] = 255;

    }

};

function setPixel( x, y, r, g, b, a ) {

    var i = ( x + y * imageData.width ) * 4;

    data[ i ] = r;
    data[ i + 1 ] = g;
    data[ i + 2 ] = b;
    data[ i + 3 ] = a;

};

//---

function drawLine( x1, y1, x2, y2, r, g, b, a ) {

  var dx = Math.abs( x2 - x1 );
  var dy = Math.abs( y2 - y1 );

  var sx = ( x1 < x2 ) ? 1 : -1;
  var sy = ( y1 < y2 ) ? 1 : -1;

  var err = dx - dy;

  var lx = x1;
  var ly = y1;    

  while ( true ) {

    if ( lx > 0 && lx < w && ly > 0 && ly < h ) {

      setPixel( lx, ly, r, g, b, a );

    }

    if ( ( lx === x2 ) && ( ly === y2 ) )
      break;

    var e2 = 2 * err;

    if ( e2 > -dx ) { 

      err -= dy; 
      lx += sx; 

    }

    if ( e2 < dy ) { 

      err += dx; 
      ly += sy; 

    }

  }

};

//---

function addParticle( x, y, z, index ) {

  var particle = {};
      particle.x = x;
      particle.y = y;
      particle.z = z;
      particle.x2d = 0;
      particle.y2d = 0;
      particle.index = index;

  return particle;

};

function addParticles( array, dir ) {
	
  var audioBufferIndexMin = 8;
  var audioBufferIndexMax = 512;
	var audioBufferIndex = audioBufferIndexMin;
	
  for ( var z = -fov; z < fov; z += 5 ) { 

    var particlesRow = [];

    for ( var x = -fov; x < fov; x += 5 ) { 
    
    	var yPos = 0;
      
      if ( dir > 0 ) {
      
      	yPos = Math.random() * 5 + particleDistanceTop;
      
      } else {
      
      	yPos = Math.random() * 5 - particleDistanceTop;
      
      }

      var particle = addParticle( x, yPos, z, audioBufferIndex );

      particlesRow.push( particle ); 
      
      audioBufferIndex++;
      
      if ( audioBufferIndex > audioBufferIndexMax) {
      
      	audioBufferIndex = audioBufferIndexMin;
      
      }

    }

    array.push( particlesRow );

  }

};

//---

function onResize(){
  	
  w = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
  h = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;

	center2D = { x:w / 2, y:h / 2 };

  canvas.width = w;
  canvas.height = h;

  context.fillStyle = '#000000';
  context.fillRect( 0, 0, w, h );

  imageData = context.getImageData( 0, 0, w, h );
  data = imageData.data;

};

//---

function mouseDownHandler( event ) {

  if ( audio.paused ) {

    audio.play();

  } else {

    audio.pause();

  }

};

function mouseEnterHandler( event ) {

  mouseActive = true;

};

function mouseLeaveHandler( event ) {

  mouseActive = false;

  mousePos.x = w / 2;

  mouseDown = false;

};

function mouseMoveHandler( event ) {

  mousePos = getMousePos( canvas, event );

};

function getMousePos( canvas, event ) {

  var rect = canvas.getBoundingClientRect();

  return { x: event.clientX - rect.left, y: event.clientY - rect.top };

};

//---

function render() {

	var frequencySource;
	
	if ( analyser ) {
  
  	frequencySource = new Uint8Array( analyser.frequencyBinCount );

    analyser.getByteFrequencyData( frequencySource );
  
  }

  //---

	var sortArray = false;

  //---

  for ( var i = 0, l = particles.length; i < l; i++ ) {

    var particlesRow = particles[ i ];
		var particlesRowBack;

		if ( i > 0 ) {

			particlesRowBack = particles[ i - 1 ];

		}

    for ( var j = 0, k = particlesRow.length; j < k; j++ ) {

      var particle = particlesRow[ j ];

      var scale = fov / ( fov + particle.z ); 

      particle.x2d = ( particle.x * scale ) + center2D.x;
      particle.y2d = ( particle.y * scale ) + center2D.y;

      //---

      particle.z -= speed;
      
      if ( analyser ) {
      
        var frequency = frequencySource[ particle.index ];
      	var frequencyAdd = frequency / 10;

        particle.y = frequencyAdd + particleDistanceTop;

      }

      if ( particle.z < -fov ) {

        particle.z += ( fov * 2 );

        sortArray = true;

      }

      //---
      
      var lineColorValue;

      if ( j > 0 ) {

        var p = particlesRow[ j - 1 ];

        lineColorValue = Math.round( i / l * 155 );//255

        drawLine( particle.x2d | 0, particle.y2d | 0, p.x2d | 0, p.y2d | 0, 0, lineColorValue, 0, 255 );

      }

			if ( i > 0 && i < l - 1 ) {

				var pB = particlesRowBack[ j ];

				drawLine( particle.x2d | 0, particle.y2d | 0, pB.x2d | 0, pB.y2d | 0, 0, lineColorValue, 0, 255 );

			}

    }             

  }

  //---

  if ( sortArray ) {

    particles = particles.sort( function( a, b ) {

      //return ( b[ 0 ].z === a[ 0 ].z ? 0 : ( b[ 0 ].z < a[ 0 ].z ? -1 : 1 ) );
      return ( b[ 0 ].z - a[ 0 ].z );

    } );

  }
  
  //---

  for ( var i = 0, l = particlesSky.length; i < l; i++ ) {

    var particlesRow = particlesSky[ i ];
		var particlesRowBack;

		if ( i > 0 ) {

			particlesRowBack = particlesSky[ i - 1 ];

		}

    for ( var j = 0, k = particlesRow.length; j < k; j++ ) {

      var particle = particlesRow[ j ];

      var scale = fov / ( fov + particle.z ); 

      particle.x2d = ( particle.x * scale ) + center2D.x;
      particle.y2d = ( particle.y * scale ) + center2D.y;

      //---

      particle.z -= speed;
      
      if ( analyser ) {
      
        var frequency = frequencySource[ particle.index ];
      	var frequencyAdd = frequency / 10;//circle.frequencyFactor;

        particle.y = -frequencyAdd - particleDistanceTop;

      }

      if ( particle.z < -fov ) {

        particle.z += ( fov * 2 );

        sortArray = true;

      }

      //---
      
      var lineColorValue;

      if ( j > 0 ) {

        var p = particlesRow[ j - 1 ];

        lineColorValue = Math.round( i / l * 255 );//255

        drawLine( particle.x2d | 0, particle.y2d | 0, p.x2d | 0, p.y2d | 0, 0, Math.round( lineColorValue / 2 ), lineColorValue, 255 );

      }

			if ( i > 0 && i < l - 1 ) {

				var pB = particlesRowBack[ j ];

				// v1 = { x:particle.x2d | 0, y:particle.y2d | 0 };
				// v2 = { x:pB.x2d | 0, y:pB.y2d | 0 };

				//var lineColorValue = Math.round( ( ( i - ( fov / 5 ) ) / l ) * 255 );

				//drawLine( v1, v2, lineColorValue, lineColorValue, lineColorValue, 255 );
				drawLine( particle.x2d | 0, particle.y2d | 0, pB.x2d | 0, pB.y2d | 0, 0, Math.round( lineColorValue / 2 ), lineColorValue, 255 );

        }

    }

  }

  //---

  if ( sortArray ) {

    particlesSky = particlesSky.sort( function( a, b ) {

      return ( b[ 0 ].z - a[ 0 ].z );

    } );

  }
  
  //---

  if ( mouseActive ) {

    center2D.x += ( mousePos.x - center2D.x ) * 0.015;

  } else {

    center2D.x += ( ( canvas.width / 2 ) - center2D.x ) * 0.015;

  }

};

//---

function animate() {

  clearImageData();
  
  render();
  
  context.putImageData( imageData, 0, 0 );

  requestAnimationFrame( animate );

};

window.requestAnimFrame = ( function() {

    return  window.requestAnimationFrame       ||
            window.webkitRequestAnimationFrame ||
            window.mozRequestAnimationFrame    ||
            function( callback ) {
                window.setTimeout( callback, 1000 / 60 );
            };

} )();

//---

init();
            
          
!
999px

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