code: function(mute) {
              if (!Crafty.support.audio) return;
              var c;
              for (var i in this.channels) {
                  c = this.channels[i];
                  c.obj.volume = mute ? 0 : c.volume;
              }
              this.muted = mute;
          }
docs: #Crafty.audio._mute
  @comp Crafty.audio
  @kind Method
  @kind private
  
  @sign public this Crafty.audio._mute([Boolean mute])
  
  Mute or unmute every Audio instance that is playing.