Originally Posted by tighr
I have my PC set up to output 5.1 audio via HDMI to the NR609. Under "display", it clearly shows that the input to the receiver is Multich PCM 5.1.
When I am watching OTA TV using WMC, most of my local broadcasts are 2.0, and the computer properly sends the audio as stereo left and right to the receiver, but is there no way to simulate surround sound as Pro-Logic II? The only way I can get any audio out of the center channel and surrounds is if I set it to "All-Ch Stereo".
If I play 5.1 movies from my computer using "direct", everything plays correctly.
I've run across this recently also. So far, it always been a fault or mis-configuration in the playback device
or input device. In every case, I've been able to correct it (at the HTPC).
I do a lot of stuff with HTPC and the new WD-Live-TV-SMP. When I use to use DVI and Optical SPDIF ... it never seemed to be a problem.
However, when I switched over to running both audio AND video over HDMI, this problem surfaced. The amp shows MultiCh and you can't switch to "simulated surround" listening modes like PLIIx or NEO:6 .
What happens is the playback device is incorrectly sending 2 channels of sound with 4 channels of silence (6 total). When this hits the amp (instead of just 2 channels), that's what it plays. It doesn't know how to drop certain audio tracks that are already present.
I suppose it can also happen with poorly encoded media files, but it's unlikely the creator would enclude extra tracks of silence. So far, it's always been the playback device incorrectly creating those and "inserting" them into the signal sent to the amp.