old_contents: (function ( Dancer ) {
  
    var CODECS = {
      'mp3' : 'audio/mpeg;',
      'ogg' : 'audio/ogg; codecs="vorbis"',
      'wav' : 'audio/wav; codecs="1"',
      'aac' : 'audio/mp4; codecs="mp4a.40.2"'
    },
    audioEl = document.createElement( 'audio' );
  
    Dancer.options = {};
  
    Dancer.setOptions = function ( o ) {
      for ( var option in o ) {
        if ( o.hasOwnProperty( option ) ) {
          Dancer.options[ option ] = o[ option ];
        }
      }
    };
  
    Dancer.isSupported = function () {
      if ( !window.Float32Array || !window.Uint32Array ) {
        return null;
      } else if ( window.AudioContext || window.webkitAudioContext ) {
        return 'webaudio';
      } else if ( audioEl && audioEl.mozSetup ) {
        return 'audiodata';
      } else if ( FlashDetect.versionAtLeast( 9 ) ) {
        return 'flash';
      } else {
        return '';
      }
    };
  
    Dancer.canPlay = function ( type ) {
      var canPlay = audioEl.canPlayType;
      return !!(
        Dancer.isSupported() === 'flash' ?
          type.toLowerCase() === 'mp3' :
          audioEl.canPlayType &&
          audioEl.canPlayType( CODECS[ type.toLowerCase() ] ).replace( /no/, ''));
    };
  
    Dancer.addPlugin = function ( name, fn ) {
      if ( Dancer.prototype[ name ] === undefined ) {
        Dancer.prototype[ name ] = fn;
      }
    };
  
    Dancer._makeSupportedPath = function ( source, codecs ) {
      if ( !codecs ) { return source; }
  
      for ( var i = 0; i < codecs.length; i++ ) {
        if ( Dancer.canPlay( codecs[ i ] ) ) {
          return source + '.' + codecs[ i ];
        }
      }
      return source;
    };
  
    Dancer._getAdapter = function ( instance ) {
      switch ( Dancer.isSupported() ) {
        case 'webaudio':
          return new Dancer.adapters.webkit( instance );
        case 'audiodata':
          return new Dancer.adapters.moz( instance );
        case 'flash':
          return new Dancer.adapters.flash( instance );
        default:
          return null;
      }
    };
  
  })( window.Dancer );
  
new_contents: (function ( Dancer ) {
  
    var CODECS = {
      'mp3' : 'audio/mpeg;',
      'ogg' : 'audio/ogg; codecs="vorbis"',
      'wav' : 'audio/wav; codecs="1"',
      'aac' : 'audio/mp4; codecs="mp4a.40.2"'
    },
    audioEl = document.createElement( 'audio' );
  
    Dancer.options = {};
  
    Dancer.setOptions = function ( o ) {
      for ( var option in o ) {
        if ( o.hasOwnProperty( option ) ) {
          Dancer.options[ option ] = o[ option ];
        }
      }
    };
  
    Dancer.isSupported = function () {
      if ( !window.Float32Array || !window.Uint32Array ) {
        return null;
      } else if ( !isUnsupportedSafari() && ( window.AudioContext || window.webkitAudioContext )) {
        return 'webaudio';
      } else if ( audioEl && audioEl.mozSetup ) {
        return 'audiodata';
      } else if ( FlashDetect.versionAtLeast( 9 ) ) {
        return 'flash';
      } else {
        return '';
      }
    };
  
    Dancer.canPlay = function ( type ) {
      var canPlay = audioEl.canPlayType;
      return !!(
        Dancer.isSupported() === 'flash' ?
          type.toLowerCase() === 'mp3' :
          audioEl.canPlayType &&
          audioEl.canPlayType( CODECS[ type.toLowerCase() ] ).replace( /no/, ''));
    };
  
    Dancer.addPlugin = function ( name, fn ) {
      if ( Dancer.prototype[ name ] === undefined ) {
        Dancer.prototype[ name ] = fn;
      }
    };
  
    Dancer._makeSupportedPath = function ( source, codecs ) {
      if ( !codecs ) { return source; }
  
      for ( var i = 0; i < codecs.length; i++ ) {
        if ( Dancer.canPlay( codecs[ i ] ) ) {
          return source + '.' + codecs[ i ];
        }
      }
      return source;
    };
  
    Dancer._getAdapter = function ( instance ) {
      switch ( Dancer.isSupported() ) {
        case 'webaudio':
          return new Dancer.adapters.webkit( instance );
        case 'audiodata':
          return new Dancer.adapters.moz( instance );
        case 'flash':
          return new Dancer.adapters.flash( instance );
        default:
          return null;
      }
    };
  
    // Browser detection is lame, but Safari 6 has Web Audio API,
    // but does not support processing audio from a Media Element Source
    // https://gist.github.com/3265344
    function isUnsupportedSafari () {
      var
        isApple = !!( navigator.vendor || '' ).match( /Apple/ ),
        version = navigator.userAgent.match( /Version\/([^ ]*)/ );
      version = version ? parseFloat( version[ 1 ] ) : 0;
      return isApple && version <= 6;
    }
  
  })( window.Dancer );
  
subject: Add detection for Safari 6 to go to flash since it improperly implements Web Audio API