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I've purchased an Asus Xonar DG as replacement for faulty onboard audio in a Medion 8822 as it has an optical output which is all I really need to feed my HTPC.

I uninstalled the previous drivers/devices, switched the PC off, inserted the Asus card, powered up, disabled the onboard audio in the BIOS, then installed the driver that came on the CD (same version as on Asus' website as of today) and everything went perfectly - no errors.

I set the audio devices up in Windows and in the Asus utility (SPDIF enabled, 6-ch audio) as I would expect to see them work, but the only thing is I have no digital audio from test tones within Windows/the Asus utility, PCM audio or Dolby Digital from DVD. Analogue audio is fine.

I've uninstalled things and reinstalled a couple of times now, as well as trying almost all combinations of analogue/digital outputs but can't get it sorted.

Does anyone have any tips on how to get this working? This card has just been released so there isn't much out there to go on.


  • The light on the toslink port is lit.
  • OS is Vista 32-bit SP2 and all up to date, pretty much a fresh install with almost no 3rd party applications installed
  • This page seems to suggest that a digital output device in Windows is not needed with Xonar cards as it was with the previous Realtek so I have it set to Analog. The only other output device is S/PDIF pass-thru
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I'm having the same issue, no SPDIF audio out at all. Don't know what to do. Tried everything possible. Tested cables and everything with my other device. Still no luck. – cyberboy Sep 11 '14 at 23:49

Had the same issue, solved it;

In the Xonar Audio Center, under 'Main', make sure SPDIF Out is TICKED and PCM is selected.

Hope this helps.

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I had no digital signal but got spdif pass through activated and a peak while playing music or audio. I then opened the DG audio center. In the main area I clicked on "spdif off" located beneath this dropdown menu. After a second I got sound back.

I had a Xonar DG with Logitech z5500.

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All that I can suggest is to right click on the speaker icon in the taskbar and choose Playback Devices. From there, make sure that S/PDIF is set to enabled and possibly default.

Next, also you may want to check the cable is working ok - try it with another device, and more importantly, make sure that the device you are using with is enabled and working fine - on a friends AMP, we were trying to get it working for a few minutes before we figured that the S/PDIF port required selecting in a special menu and it is not on / detected automatically.

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v As I mentioned in my finalnote, the Xonar cards seem to work differently to most other cards. Instead of having a digital output listed within Windows, they only have an analogue output but this is 'mirrored' to the S/PDIF based on the number of channels you select in the Asus utility. Cable is fine, tested with an Xbox, as is receiver. – Lunatik Sep 27 '10 at 10:19
I would suggest still just double checking, in the playback devices, right click on a empty space and choose "show disabled devices", however, I have never dealt with one of these so cannot help you further - sorry. – William Hilsum Sep 27 '10 at 13:01

You might download and install the latest Asus Xonar DG Vista driver.

You can also try the patched and improved non-official version of the driver in
ASUS XONAR Unified Drivers 1.11 & ASIO 1.0 patch

Take normal precautions to be able to rollback the driver change, such as creating a system restore point.

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The card is new to market (mid-August) and there is only one version of the unified Asus driver that supports the DG. The unofficial driver fails to recognise the DG during install and forces the installation to exit. – Lunatik Sep 27 '10 at 10:21
For a new card, why don't you get help from Asus Support ( ? – harrymc Sep 27 '10 at 10:40
Have done that, they're as stumped as I am and suggest it might be faulty, but gave no assurance that another wouldn't be exactly the same. – Lunatik Sep 27 '10 at 10:47
It wouldn't hurt exchanging the card, unless that means that you can't be reimbursed. – harrymc Sep 27 '10 at 12:54
Tried card in another PC, working fine. Given up now tbh. – Lunatik Oct 4 '10 at 5:44

I'm just taking a wild stab here, but if you have only tried test sounds, it could be that the optical link isn't sending data for long enough for the HTPC to initialize the sound.

This might not be relevant to all devices, but with my Logitech Z5500s (I know, I know, boooo) they take about a second of audio playback with optical before you actually hear anything.

I'm just thinking that if you've only tried test tones, that could be the problem, if you've tried music or something, completely disregard this.

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"..I have no digital audio from test tones within Windows/the Asus utility, PCM audio or Dolby Digital from DVD." :( – Lunatik Sep 27 '10 at 10:16

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