Help with audio setup

[thekobrakais]

Hey guys,

i need some help/information on my audio setup.

I currently have a Vizio VO47LF, Sony BDP-S350, and an old Sony 5.1 HTiB.

Since the receiver is old, it obviously doesn't have HDMI. I have the blu-ray player connected via HDMI to the Vizio for video and optical straight to the receiver for audio.

I understand that you can't get lossless audio with optical. But what exactly is my receiver doing on blu-rays that have Dolby TrueHD or DTS Master Audio? Am I losing quality as it tries to convert it to DD 5.1?

The reason I ask is because I watched Iron Man and Transformers the other day and the audio on Iron Man was great, but I found Transformers a little weak in comparison. Both have the Dolby TrueHD and both have had great audio reviews.

Any ideas?