I've recently added a Pioneer 575 DVD Player to my system and connected it to my Song DBR830 amp via optical and 6 channel analog (phonos), for the first time. Ive also got a Panasonic DMR100 DVD recorder connected via optical only. I've only got 5 x DVDAs so far but three of them will NOT play on the E100 in standard 5.1, only 2 ch PCM. The other two, which coincidentally are both Queen, will play fine in standard 5.1. They are both 96/24 if this has anything to do with it. I understand that on the Pioneer that the optical will be disabled (as 6 channel analog is connected) when playing DVDAs, but it also seems to be disabling it on the Panasonic, but not on all discs Any ideas?