Hi, I hate to barge in like this, but I seem to be having a problem that is closely related to this.
This is my first posting so please excuse any apparent ignorance!!
I too have the 606 and initially I had a fairly unsophisticated Phillips HD DVD player hooked up by HDMI. Whatever format the disc was in ( eg Dolby or DTS) that was what came up on the Onkyo. Because I have a Samsung 46 F81 I wanted to enjoy Blu Ray and full HD sound, hence the PS3!
However, when I play a disc through the PS 3 the bonus material , intro etc shows as Dolby etc but once the actual soundtrack starts that goes. I note from another posting here the need to set the BD/DVD Audio output to Linear PCM and play it as `Multichannel`. This seems ok and when I press `Select` on PS3 Remote it shows `Dolby Digital`. However, it shows this regardless of whether the audio on the disc is Dolby, DTS, or True HD.
I dont profess to having the finest ear and it may be that I might not tell the difference, but it is frustrating to have this combination of kit and not to be able to get the very best out of it!
And yes, on Audio output settings I have HDMI > Automatic which ticks all the boxes for you!
Cheers