I am not getting any audio from HDMI. I am using Windows 7 64 bit, Gigabyte 970 motherboard, a Vizio plasma tv connected directly to my Evga Nvidia GeForce GTX 660 GPU via HDMI cable. In the control panel - audio devices the Vizio tv shows up but is listed as not plugged in. Obviously it is physically plugged in and working becuase my display works but no audio. I tried uplugging and reconnecting the HDMI cable and when I do that the audio works, however, the resolution of the display becomes distorted. Then when I switch imputs on the display from HDMI to a TV channel and then back to HDMI the audio goes away again but the resolution is fixed and goes back to normal. I have also made sure that I have the latest Nvidia drivers installed. I am at a loss with this audio problem and will appreciate any help!

 

Thank you

 

Ben

Depending on the HDMI specification.

 

If both your HDMI connectors support 1.4 or 1.3, you should be able to transfer audio. 1.2 doesn't support audio. Check that first.

 

It sounds to me that one side doesn't have enough bandwidth.

 

I do believe both connectors do support audio. Before I upgraded my system I was using an EVGA Nvidia GeForce GTX 550 ti with the same Vizio display and had no problems with audio using HDMI.

 

Is it possible that I may need to connect the motherboard audio jack to the video card to get sound via hdmi?

I know that Nvidia has some audio drivers... you installed those?

 

I downloaded this HDMI audio driver from Nvidia http://www.nvidia.co...1.00.00.59.html

 

When I ran the installer for the drivers it told me that the setup program could not find any drivers that are compatible with my installed hardware?!

 

EDIT**

 

Upon further investigation I discovered that the drivers above are applicable for almost all GTX 600 series except for the 660.

 

I am currently downloading the correct drivers and will update with results.

After downloading and installing the latest drivers from Nvidia there is no change. Still no audio via hdmi.

 

Again, if I unplug the HDMI cable from the TV and then plug it back in the audio works but the display becomes distorted as if there is no HD and it even shows up in audio device manager as default. Then if I switch inputs on the TV say from HDMI to cable then back to HDMI - the display looks crisp and clear in HD like it should but then there is no audio again and audio device manager says it is unplugged again.

Well, I don't know then, sorry. Not a pro in HDMI area, only know what I said... drivers, specification, if all fullfills the spec, and there is in all components enough bandwidth, then it should work. And did you try lower quality videos, not HD? Did you also play HD via 550?

 

Yes i used HD on my old 550 with no problems. I noticed that when I do have audio with poor video by unplugging the TV is automatically changing the hdmi input to 720p. Then when I switch the inputs and I loose audio the TV automatically changes to the hdmi resolution back to 1024x768@60hz.

**RESOLVED**

 

I am extremely pleased to report that after spending 30 minutes on the phone with the wonderful folks at Nvidia Tech Support my problem has been resolved.

 

The problem was with the resolution settings. I originally used Windows - Display - Screen Resolution to set my resolution when I should have used the Nvidia Control Panel instead.

 

The tech was able to determine that my audio was only working on 720p resolution and not the correct 1024x768 resolution because I had not set my resolution using the Nvidia Control Panel. I opened up the Nvidia Control Panel, selected and set my desired resolution and now everything is working great. I now have a crystal clear HD display with audio via HDMI.

 

One thing to note: the tech did have me open up Device Manager and disable the on board audio device so that the only active audio device is Nvidia. Although this was not the solution, it was a step that the tech had me go through.

 

I hope this information can help somebody in the future.

 

Thank you for all your assistance!

 

-Ben