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Sounds like IRQ conflicts between USB Root Hub and Video Card to me...

Read my thread - http://www.motunation.com/forum/viewtopic.php?t=24657

Try starting from the post Posted: Sun Jun 01, 2008 11:44 pm Post subject: Motu 828 MKII USB, pops, crackle, squeals - NOT FIXED!

Not sure on that one

It kind of depends which Drive is connected to the controller that is running on PIO. For a (very) old HDD, or an old CD/DVD ROM then it could be a valid representation of the Drive. I think that this is unlikely, though. Drives have been UDMA Level 2 and above for a while, now. If it is one of your...

One thing - diagnosis is everything! I can't recommend highly enough having SysInternals Process Explorer running whilst everything is working OK, then when everything goes tits-up. If you are having problems related to hardware and configuration then when it all goes bad, your "Hardware Interr...

I would say that they were of equal importance to my solution. I had IRQ conflicts and a hard drive problem... A quick way to determine if you have a hard drive problem is to go to Device Manager -> IDE ATA/ATAPI controllers and examine your Primary and Secondary IDE controllers. Look at the Advance...

Not too sure, then.

I'm not trying to be a smart-arse, but you know that XP 32bit can only address 4GB of RAM?

Are you using XP 64-bit?

Check that your Graphics card isn't using the same IRQ as your Audio interface...

Hey Mush, It looks like a pretty solid rig to me. The good news is that it has an Intel chipset (same as mine) so that should be cool. It would be worth checking the vendor of the on-board firewire chip. I'm not sure if Intel provide this - you might end up with the firewire chip not being a "M...

So, time for an update... I'm pleased to report that the problem has been fixed with the installation of my new Hard Drive, and the use of a non-ACPI (MPS Multiprocessor) Hardware Abstraction Layer. Everything went according to plan and I now have (for the first time ever) full, uninterrupted audio ...

Have a look towards the end of this thread - it may not be your solution but it will give you some good pointers towards diagnosis...

http://www.motunation.com/forum/viewtopic.php?t=24657

Also, check your IRQs and use ProcessExplorer (http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx) to determine what is going on in your PC at the time of the audio glitch/dropout. My guess is that you'll see the "Hardware Interrupts", and consequently the "DPC"s (Deff...

OK, so here is the update from last night... I got in and continued my build-and-backup routine. Sure enough, when installing Cakewalk Sonar 7, the problem started again - the Hardware Interrupts went through the roof, and I couldn't understand why. After doing a little digging yesterday, I stumbled...

You might have the same problem as I have - see my thread http://www.motunation.com/forum/viewtopic.php?t=24657

Alas, it seems as if the old problems are back to haunt me... So, I have spent all weekend digging even deeper to find out what has changed. This is probably going to be a long-running thread until I get to the bottom of the issue. Like the rest of you, I know how bloody annoying this problem can be...