I have ADT AUDIO drivers and need some help.

In the settings for the ADT drivers  I make sure all the audio sliders are all the way up. And then I can use my speakers to turn up or down the Volume.

Now this is what I don't understand.
If I have say my CD slider all  the way up and I turn my speakers all the way up but I have no CD playing I don't even here any HISS from my speakers.

I get this this is because I am not playing any CDs or music ok.
But if I have my Line In slider tuned all the way up and my speakers TURNED all the way up but I have no sound coming into my Line In  I here a HISS???

Is this because it here the Dead Air from the Line In  but there is no Dead Air from the CD slider???

While of course within the parameters of decency and legality there are no limits on the questions that can be posed on the CH forums. I am wondering what POSSIBLE problem issue you are trying to resolve with your question? I would be interested to know if under CIRCUMSTANCES of actually playing/listening/recording audio are you actually having any issues?truenorth