///var silence = new Silence();
///var silence_channel = silence.play();
///var ew = new EventWatcher("silence_channel", silence_channel);
///var noise = new Noise();
///var noise_channel = noise.play(1000);
///var ew2 = new EventWatcher("noise_channel", noise_channel);
noise_channel:[Event type="soundComplete" bubbles=false cancelable=false eventPhase=2]
///event.currentTarget
[object SoundChannel]
///event.target
[object SoundChannel]
silence_channel:[Event type="soundComplete" bubbles=false cancelable=false eventPhase=2]
///event.currentTarget
[object SoundChannel]
///event.target
[object SoundChannel]
