Need some help with the settings for this player. I have it connected via optical cable to my Harman Kardon AVR125. Do I set the Dolby Digital to Bitstream or PCM? Do I set the DTS to Bitstream or PCM? What's PCM downconversion and do I set it on or off? I haven't hooked it up for DVD-A yet so I haven't touched the speaker settings. Do I need to adjust those too even if I don't plan on using DVD-A for the time being? Do you DVD-1600 owners use the "Cinema Mode"? And do you set the display dimmer to "BRIGHT", "Dim", or "AUTO"?