Audio not working when connected to HDTV

I connected my MacBook Pro to my Samsung HDTV LN40D503F6F and also connected an HDMI cable to the TV using Apple mini DVI cable. I tried connecting to both HDMI/DVI 1 and HDMI 2. Video works fine when connected to both the HDMI ports, but the audio didnt work. I also purchased an a 3.5 mm audio to RCA cable and tried switichin between both the HDMI ports but still it is not working. Any solution would be great. Thanks !!!

Hi:
While trying to help you, I was looking along the same lines as you were (I assume).
I did a search by the IDT 92HD73E audio codec and all I could find were drivers for system boards with Intel processors such as the driver you tried unsuccessfully.
I have finally found a W8.1 driver for that codec from a desktop PC with an AMD processor and chipset.
See if this one works...
http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?softwareitem=cp-134120-1&cc=us&dlc=en&lc=en...

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