arc996pro

I am running ARC996T PRO on a Win7 DELL T7400 with SoundMax. In ARC996Pro, Virtual Control>Recording there is a button "Set Recording Volume." It doesn't do anything. What I want to do is change the sound source -- it is now "line in" -- I want to change it to a USB Sound Card. I already...

Really need some help..... I am trying to use Arc996pro (registered) and it will not communicate with scanner. Trouble-shooting tells me to go into settings and set baud..i did this several times. I am using a usb-1 cable. Was working in the past..been 6 months since is used the scanner...