New to the forums.

Although new to DP9, I am not new to most DAWS.
Unfortunately, I can't quite figure out what I am doing wrong with the initial audio set up.
ATM, I am using the multichannel capabilities of my graphics card using hdmi.
I am not talking bit streaming surround sound - just eight channels uncompressed PCM.
On other DAWS, when I select Audio output device it either gives me the direct option to select the AMD graphics hdmi driver, and its eight outputs, or it refers me to the windows control panel where I can configure the AMD HDMI output as 8 channels ( actually it is referred to in windows as 7.1 surround ( confusing eh!) This provides eight discrete outs. I can then move and process these outputs before they go off to a surround receiver. Again, just to confirm, the receiver is set to receive 8 channels PCM, NOT bitstream surround.
IN DP9, I see windows audio device as my output, but when I try to see any of the eight outputs, I get only stereo output as available. I have no other outputs available ( i.e 1 - 8 )
Am I going mad

Any help for a newbie would be appreciated.
keith