No, nothing to do with Rice Krispies! That said, this well known Kelloggs’ breakfast cereal is a great start to the day with a splash of milk and a sprinkling of sugar, but does that make them a poor man’s Ricicles? But we digress from the point! The issue this time is with Windows Vista (Home Premium) sound on an ASUS A8N32-SLI Delux motherboard - a high performance gaming motherboard from ASUSTeK.
New system was duly built based around this motherboard, with all the up-to-date patches and drivers installed, but alas there was a terrible background noise on the sound output channels. It seemed like a complex white noise with background hum, interspersed with cracks and pops. Let’s see if we can describe it better: a hoard of mosquitos all desperate to suck your blood, a swarm of blue bottles buzzing around a dog turd, a hive of bumble bees busying themselves making honey, the cracking of wood burning in a roaring fire, the ear popping experience during a particularly rapid decent on an air flight - all of which were competing with a roadwork crew using pneumatic tools at full pelt!
The initial cure was to reach over to the volume control on the speakers, turning it all the way down until the OFF click. Well that wasn’t going to be much of a long term fix for anyone with a set of working ears, but at least the buzzing had temporarily ceased!

These situations always make your spirit dip at the prospect of having to dismantle everything to replace a faulty motherboard. Thankfully this wasn’t required on this occasion and the “interim workaround” was simple in implementation! However, it is still puzzling as to why the Realtek sound driver and/or Windows Vista device management has such a configuration - more thoughts in a moment once you’ve had a chance to see the problem!
First big clue was you could hear yourself when using a headset. Mmmm! That’s not normal ,well it wasn’t under Windows XP. An observation that started to make the cogs turn. Thankfully, all the years of university and electronic design and diagnosis experience would be useful in understanding what may be going on. Much of this noise may be generated by this “monitoring effect”, where the mixing of these signals could be causing the instability through positive feedback. In these circumstance positive feedback would be bad, very very bad - not in any way “positive” at all!
Best way to describe what is going on is to explain it in terms that everyone understands and has seen in the flesh. You know that horrible howling that comes from the speakers when a singer gets too close to them with the microphone - well that’s the same cause and effect. When we mention “howling” in relation to singers, we’re not talking about their dulcet tones, but that horrible screeching that makes you want to grasp your ears for protection!
Eureka! Now to find a solution or at the very least a workaround to this design flaw. We don’t care too much who’s fault it may be, we’re more interested in finding some way to get around it. The finger pointing can happen later when we get Microsoft over here to have a look at this epic post.
The solution lay in the Sound system so it was off to:
Control Panel -> Sound
Next we want to navigate to the area of the sound system that takes to do with Sound output or in other words, “Speakers”. Steps are:
Playback tab -> Select output destination (in our case “Speakers”) -> Properties button

Now we’re almost at the culprit:
Press on the “Levels” tab to see the problem!
Ensure the Audio Output is the only one selected, all the rest MUST be disabled (muted) and you may need to scroll down to get them all. The image below is what you are trying to achieve:
… and in case it isn’t clear, the buttons states are shown clearly in the legend below:
Enabled
 |
Disabled
|
Job done, accept (Ok) all the dialog boxes until you’re back to the Control Panel.
Hopefully, you can now crack the volume back on and crank it up without fear of a deafening din emanating from the speakers.
Like us, you were most likely presented with all these possible sound sources being enabled. How does that makes sense, this is supposed to be the output, not the inputs? Our best guess would be that it allows you to select the proportions of the sounds going into the output channel just like a mixer desk. However, something is wrong with the set-up we put together. More interesting was that all these inputs still worked as advertised even when they were disabled. However, the key difference was the background noise was gone: perfect sound at last. Ahhh!
Why are we blogging about this one. Well, we wasted time, energy and resources fault finding this system. We hope to spare others the same pain and loss of time that no one can ever regain. Please leave us a comment if this post has been useful and tell us how you happened to find it. It would also be useful if you could supply details of your set-up and the nature of the sound issue you’ve been experiencing. Every little piece of information is another piece for the problem jigsaw. As we’ve already indicated, the problem will also be reported to Microsoft as a bug for them to fix. At the very least they will have a look and pass it along to Realtek for them to fix. We’ll simply say to Bill and his gang to have a read at this post and request an appropriate response which would be a fix if the problem is Windows Vista related.
Top tip time for all you self builders out there. Ensure you’ve got all the up to date drivers and utilities from the manufacturer of your hardware for the best chance of a working Vista system. You may also have to update the BIOS, but do take great care when performing a “flash” update as there is always the chance it will go badly wrong resulting in a bundle of useless electronic components. You may end up having to replace the BIOS chip if things go wrong! Luckily it has never happened to us when doing a flash update, but there is always the danger that power will be disrupted or something else will cause the update to fail! You have been warned and as always do it at your own risk.
A Last Word on Vista…
Shocker! It seems the rumours may be true! There are indeed some bugs in Microsoft’s new baby, which isn’t really a surprise for such a complex product. More of a worry looks to be the incomplete or flawed hardware / driver support that requires more work from all the manufacturers involved.
Windows Vista will only become a killer operating system if all interested parties gets their respective acts together to resolve these types of problems.
And finally…
Keep an eye out for upcoming posts about the cool new bits of Vista. There are many, honest!
Update:
After making this blog post, we thought it would be an idea to check the Technorati tag for the motherboard model and see what other problems lay ahead. We were surprised, but really shouldn’t have been, to find out that someone else had already found solutions to this issue. We recommend this other blog article as it is makes for interesting reading and provides additional information.
We note Peter Chng states the problem is down to the NVIDIA bits, which again shouldn’t come as much of a surprise, since it took them considerable effort and ultimately help from Microsoft to get working graphic drivers for Windows Vista. Looks like they may need Microsoft’s help again to sort out the sound drivers to alleviate the flawed hardware design!
As part of our fault diagnosis process we had actually downloaded and installed the Realtek drivers that he mentions in his post, something that is implied in our earlier commentary. However, this is such an important part of this story that it is worth explicitly spelling it out: so people, go get the up-to-date Realktek driver for this model and then implement our solution of disabling sounds inputs.
If only we had spotted this blog post when we Googled the problem first time around! So much time and heartache could have been avoided with some additional Googling with other keywords!
Technorati Tags: A8N32-SLI, ASUS, ASUSTeK, BIOS, drivers, Kelloggs, NVIDIA, Peter Chng, Rice Krispies, Realtek, Ricicles, sounds system, Vista, Windows