Hi, i have ATI Radeon 5450, i used to be able to bitstream HD audio, dolby, dts from my HTPC to my AVR Onkyo 606 with Samsung LN52A550. Everything is connected via HDMI and my receiver will show audio ie. HD Master, True-HD etc, or dolby, DTS. Since upgrading to Windows 8, i am no longer able to passthrough audio to my receiver, all i see is PCM. Also, in my sound configuration in windows, i now only see stereo! I used to be able to select 5.1, 7.1 and quadrophonic? options before. I have the latest Catalyst 13.1 and a clean install Windows 8 and still to no avail. Did W8 change how it detects my audio config? I never did any EDID override back with Windows 7 with Catalyst 10.5 drivers. Do i need an EDID override? Any help would be appreciated or directions on how i could fix this. Thanks in advance.