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Here are my specs first:

  • ECS P4M800PRO-M478 (V1.0)
  • Intel P4 Northwood 2.8 GHz
  • 2x 512MB PC2-4200 DDR2-533 SDRAM
  • Maxtor 120 GB SATA HDD
  • Visiontek HD 3650 512 MB DDR2 AGP

I have Microsoft UAA Bus Driver for High Definition Audio as a system device without a driver. However, I don't know where to get an "official" driver for this "device". It just seems so generic. However, I noticed that when I had the video card in another machine, that machine required the same driver. Still, I've downloaded all possible video drivers and that device still needs a driver.

Where can I find it?

EDIT 1: Formatted hard drive, installed XP with the bare essentials, then installed the card & drivers... still the same problem.

EDIT 2: Installed the ATi HDMI Audio Driver after the UAA driver installation failed, due to XP being SP3 already. Now, the "Found New Hardware" dialog that pops up on start-up doesn't come up anymore, but in the Device Manager, I still get an (!) by Microsoft UAA Bus Driver for High Definition Audio. Hmph...

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up vote 1 down vote accepted

Turns out the audio has always worked... just had a bad cable. Still, the Device Manager still listed a driver conflict with the UAA High Definition Audio and it was never resolved. Switching over the Windows 7 Home Premium, drivers were automatically found and there were no issues at all.

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The "UAA Driver" is the generic class audio driver. Video drivers aren't going to help you. You'll most likely have to get the audio driver from your motherboard manufacturers website.

There is one caveat: ATI video cards (like the one you have) can pass audio over HDMI, and have an embedded audio codec to do that, which does require a driver. Normally this is packaged in with the latest ATI Catalyst drivers. I have seen the driver offered standalone before though...


Ah! It's here.

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The first download is useless since I'm using XP SP3 and I installed the second one, but no difference... my video card doesn't even have native HDMI. I just have an eBay DVI-HDMI adapter. – Wesley Jun 27 '10 at 0:55

You should download and install the related audio driver for your motherboard. In your motherboard's official product page, navigate to Download tab, and expand Sound panel. There are links to Realtek AC'97 Audio Driver (19.9 MB).

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I have installed all the drivers already. I wouldn't be asking this question if I didn't. – Wesley Jun 25 '10 at 19:08
What exact problem are you experiencing then? Doesn't your PC play sounds or videos properly? – Mehper C. Palavuzlar Jun 25 '10 at 20:31
No sound... even though I reinstalled the driver without any audio plugs connected. – Wesley Jun 27 '10 at 0:54
Sound works, UAA still doesn't have driver... – Wesley Jul 1 '10 at 4:02

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