XPost: alt.engineering.electrical, sci.electronics.design, sci.e   
   ectronics.repair   
   From: invalid@invalid.net   
      
   > With R12 cranked down to minimum R the output of U3 goes down to about   
   > 600µVPP out with 2VPP out of the sound card(s), and up to about 6VPP   
   > with R12 at 10k so, if you use a 10k pot for R12, there's your center   
   > channel volume control.   
   > ---   
   > JF   
      
   Yeah, R12 needs to be a pot. That does it.   
      
   Thanks!   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)