message: testing that volume is muted when -Infinity is passed into constructor
diff: @@ -91,6 +91,16 @@ function (Volume, Basic, Offline, Test, Signal, PassAudio, PassAudioStereo) {
  });
  });
  + it("muted when volume is set to -Infinity", function(){
  + return Offline(function(){
  + var vol = new Volume(-Infinity).toMaster();
  + new Signal(1).connect(vol);
  + expect(vol.mute).to.be.true;
  + }).then(function(buffer){
  + expect(buffer.isSilent()).to.be.true;
  + });
  + });
  +
  it("setting the volume unmutes it and reports itself as unmuted", function(){
  var vol = new Volume(0).toMaster();
  vol.mute = true;
  