Originally Posted by dj_james
Batpig, i was hoping you could clarify something for me. this is from your wonderful site;
"If you have set everything up correctly with the PS3, the display of the Denon will read "MULTI CH IN" indicating that it is getting decoded, multichannel PCM audio from the PS3 (note that if you are running a 7.1 setup it may say "MULTI CH IN + PLIIx" meaning that the receiver is matrixing 7.1 from 5.1). "
i am using 7.1 and it does say multi ch in but it it does night display "PLIIx", is there any way to force it into this mode?
well, is the input signal already 7.1? PLIIx is a used to matrix 5.1 > 7.1, but if the input signal is already 7.1
then it isn't needed!
one of the biggest things to understand is that what the display says depends on the relationship between the input signal (the input) and the surround mode (the output). 7.1 > 7.1 needs no extra processing so you would never see "+ PLIIx" on the display with a 7.1 source input.
you can check the input signal by hitting the "Status" button on the unit and reading the display, or by going to the OSD and then "Information > Audio Input Signal." (pg 48 of the manual) If it says "3/2/.1" that indicates a 5.1 input; if it says "3/4/.1" it is a 7.1 input.
OK, all that being said... if the signal is indeed 5.1 then you can hit the "Standard" button which will turn any 5.1 surround mode into "plus PLIIx" on the display. Or hit "Cinema" or "Music" to directly engage "PLIIx Cinema" or "Music" modes.
You can also set this manually in the Surround Parameter menu under the "Surround Back" parameter (see pg 45 of the manual). Set it to "PLIIx Cinema" and it will automatically use PLIIx on 5.1 signals.
Originally Posted by Gary J View Post
Here is a little known secret. There is no such thing as 7.1. All movie soundtracks are recorded as 5.1 and any more channels are derived in the mixing studio much like PL2x does in your AVR.
There are some bluray discs with 7.1 soundtracks on them.
What Gary was referring to is that all movies are originally recorded and mastered in 5.1. When they mix a 7.1 track for a Blu-Ray, they are taking the 5.1 studio master and matrixing the rear channels, and then re-encode it as a 7.1 mix on the disc. His point was that what they are doing is simply a fancier way of what you can do it home with PLIIx.
Now, admittedly, the mixing engineer in a studio with sophisticated gear will probably create a better 7.1 mix. But it's still just matrixed 5.1> 7.1 So, the broader point is that when you realize there is no such thing as a "true" 7.1 you don't really get hung up over whether the movie has a 5.1 track or a 7.1 track.