Seem to have pretty much figured it out. Best setting for me with Cable/DVR seems to be defaulted to PLII-C with 970 automatically switching to Dolby Digital when it gets the signal (pretty much limited to HD channels).

Two channels have me perplexed however. Both Weather Channels (ie THE Weather Channel) are broadcasting a Dolby Digital signal sensed by the 970. However, it shows "Dolby Digital .0". What does that mean.

Thanks!!