I'm attempting to output multichannel PCM from blu-rays, .mkv's, and games from my Windows 7 rig.
Radeon 6950 -> HDMI -> Harman Kardon AVR 247 with firmware update.
Bitstreaming DD and DTS works fine.
Using Dolby Digital Live and DTS Connect to encode and send surround game audio works fine.
The AVR 247 supposedly gained 5.1 and 7.1 multi channel LPCM support through the latest firmware upate which I just applied.
When I attempt to send multichannel PCM from my PC, my AVR seems to just be receiving just 2 channels. It shows only the front 2 channels lit up on the front display, and wants to upconvert with Pro Logic, etc. I've read from other 247 owners that it shows "Multichannel PCM" on the front display when it's working.
In Control Panel -> Sound, "AMD HDMI Output" shows 8 channels available for output.