PCM is "good ol' basic" 2 channel stereo.   
   Same as on audio CDs.   
      
   Which is fine for any of the old matrix Dolby   
   surround settings(Surround, Surround-Pro-   
   Logic, or Pro-Logic-II).  Yes, it is lossless,   
   but you have to select one of the lossy   
   codecs(X.1) in order to employ that discrete   
   mode of surround.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)