7640 Media Center No audio after installing ATI HD 4670

I tried a video card upgrade, I was running ATI 1950, purchased an ATI HD4670 so I could make use of HDMI input on my new monitor and improve performance.
I uninstalled the existing drivers and followed the install info for the 4670. The card appeared to configure correctly and video function was great BUT i had no sound from either front or back outputs. In audio hardware set up I could no longer see Realtek HD only the ATI HD Audio as a choice. I did install teh full Catlyst Control Center version 9.1.1.
Any help greatly appreciated :-)

Hi,
Mjr_Havoc wrote:
I tried a video card upgrade, I was running ATI 1950, purchased an ATI HD4670 so I could make use of HDMI input on my new monitor and improve performance.
I uninstalled the existing drivers and followed the install info for the 4670. The card appeared to configure correctly and video function was great BUT i had no sound from either front or back outputs. In audio hardware set up I could no longer see Realtek HD only the ATI HD Audio as a choice. I did install teh full Catlyst Control Center version 9.1.1.
Any help greatly appreciated :-)
Install the latest ATI drivers, the Microsoft drivers should load by themselves. Install Realtek ATI HDMI drivers (Google "ATI HDMI Audio Device" ).
Install "ac3filter" (get it from a google search). Restart your PC after that. In ac3filter Main Tab check "Use SPDIF" and choose 5.1 audio out. In the SPDIF Tab choose the formats your Surround Sound can decode (DTS, AC3, PCM 24bit) .
Turn on your receiver. In the Audio control panel choose Realtek HDMI Output as Default, choose Properties, click Supported Formats Tab and verify which formats will play (disable "Microsoft WMA Pro Audio" ) and do the same in Advanced (choose 24bit). Now 5.1 surround should work.
regards,
erico
Message Edited by erico on 11-20-2009 09:04 PM
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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