I have the same issue. Using MSWA on the front HDMI (the only one with an USB adaptor nearby). I'm trying to stream 5.1 files thru a SP3Pro, and I'm only able to get 2.0 signals that seem to be 2 out of 6 speakers.
Maybel I'll be able to get 5.1 thru a "normal" HDMI-mini displayport (direct...
