Best sound output from BDP7600
I have a BDP7600 connected to an old Denon surround-sound amp that lacks HDMI inputs but does have optical (SPDIF) and analogue inputs for 5.1 surround sound. What is the best way to connect the Philips blu-ray player to the amp: by optical cable or by analogue? Am I right in thinking that the optical cable simply allows the digital signal (Dolby 5.1 or DTS) to pass through to be processed in the amp, whereas the analogue output has already been transcoded within the Philips blu-ray player? If the latter, then analogue connects might give me the best sound if the 7600 is able to transcode HD sound efficiently, but I don't know if this is the case. I can't find any information on the 7600's audio transcoding abilities anywhere in the manual or online.