HD Audio Problem with nVidia GT 430 and Onkyo TX-SR608 - AVS Forum
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post #1 of 4 Old 08-03-2011, 02:35 PM - Thread Starter
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Hi folks,

Hope you can help, I am pulling my hair out here. Over the past weeks I've redone my room with 7.1 Mission surround speakers and a new Onkyo TX-SR608 amp. Today the last piece of the upgrade arrived which was an nVidia GT 430 graphics card to go in my HTPC so I can bitstream HD audio.

Now, the GT 430 and the Onkyo TX-SR608 both definitely support Dolby TrueHD and DTS HD Master audio streams. I use PowerDVD 11 Ultra as my Blu-Ray software which also supports HD audio bitstreaming - but I cannot for the life of me get this to work.

When I installed the drivers for the new graphics card it installed an HD audio driver and sure enough after a restart Windows was automatically recognising my Onkyo as the HDMI audio device - this was promising!

Attachment 219093

I was immediately able to play music and video over the HDMI link and it sounded great, but no matter which blu-rays I played, I never got the HD audio stream, the option to enable HD audio was unavailable in PowerDVD.

The latest version of PowerDVD is supposed to be fairly solid, but to rule out a problem with PDVD I downloaded some TrueHD and DTA-MA sample m2ts files to play through MPC-HC. Sure enough, MPC would play the 5.1 DD stream (all the right lights on the amp) but as soon as I switched to the TrueHD stream I got no sound at all. Actually when forcing it to output the TrueHD stream the Onkyo started acting very strangely, the display kept flickering between PCM and DD like it couldn't lock on to the stream.

So, I did a bit of Googling and came across a useful guide on setting up HTPC for HD audio. First thing I notice is his screenshot:
Attachment 219095

In the Windows audio console his audio device is listing TrueHD and DTS Master as supported formats. Now take a look at my audio console:
Attachment 219094

No HD formats supported. How is this happening? Where does Windows get this information from? Please help!!
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post #2 of 4 Old 08-20-2011, 02:04 PM
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Hi sebbelcher,
I am in the same boat, have faith though it is possible
This thread at mediabrowser.tv shows that, but I still can't get it to work. I cannot even get Dolby digital out over HDMI from my 430gt to the TX-SR608. I have gone into the TX-SR608 setup screen and changed the source preferences to "straight-through" but all I get on the TX-SR608 screen is "multichannel" or "multichannel PCM". I have tried using MPC-HC with ffdshow, media center, TMT5 with updates, and Windows Media Player. I uninstalled all my codecs and started fresh this morning but still no go. On ffdshow using MPC-HC it shows the input is DTS-HD or Dolby True HD depending on the source, and the output says HDMI Bitstreaming, but I get no sound at all. I tried a different HDMI cable, no help.
I will try using the DVD Hdmi input instead of the PC input maybe that will help. Also I have tried switching the sound mode from direct to multichannel on the TX-SR608, enabling and disabling the "allow programs to take exclusive control" check box in the windows sound settings, neither setting made a difference.

Ill let you know if I figure it out.

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post #3 of 4 Old 04-14-2012, 02:48 PM
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Quote:
Originally Posted by scoyne88 View Post

Hi sebbelcher,
I am in the same boat, have faith though it is possible
This thread at mediabrowser.tv shows that, but I still can't get it to work. I cannot even get Dolby digital out over HDMI from my 430gt to the TX-SR608. I have gone into the TX-SR608 setup screen and changed the source preferences to "straight-through" but all I get on the TX-SR608 screen is "multichannel" or "multichannel PCM". I have tried using MPC-HC with ffdshow, media center, TMT5 with updates, and Windows Media Player. I uninstalled all my codecs and started fresh this morning but still no go. On ffdshow using MPC-HC it shows the input is DTS-HD or Dolby True HD depending on the source, and the output says HDMI Bitstreaming, but I get no sound at all. I tried a different HDMI cable, no help.
I will try using the DVD Hdmi input instead of the PC input maybe that will help. Also I have tried switching the sound mode from direct to multichannel on the TX-SR608, enabling and disabling the "allow programs to take exclusive control" check box in the windows sound settings, neither setting made a difference.

Ill let you know if I figure it out.

Hey guys. Exact same setup, exact same problem.

The Onkyo TXSR608 shows up in Windows 7 as a 2 channel device on my Nvidia Geforce GT 430. It does not show the capability of decoding DTS/multi channel when in Sound setup.

Were you guys able to figure out what is wrong, or what is going on?
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post #4 of 4 Old 04-14-2012, 07:27 PM
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Not sure if I can help but I'm using Win7 with an Ati 5450 video card and an Asus HDAV slim.

In my output devices, I can select or HDAV to bitstream.

I do not see my avr listed as a playback device.

What choices do you have for playback devices?
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