Quote: It's an HP Small Form Factor Corporate PC with Intel Dual Core 2 - no Hyperthreading or Speedstep. Its small and quiet. I've been in the BIOS before, it's basic, but I'll have a poke around. I guess what confused me and I found it strange that the Musiland had no noise problems.    

Of course, a ground loop... I grabbed a laptop today and sure enough, quiet as a mouse, even with the AC adaptor plugged in. I obviously have an issue with my music PC. Thanks guy's.

Hello knowledgable headfiers,   Short Version: My DI has a lot of electical buzz coming though, anyone else found this?   Long Version: I've had the DI for around 2 weeks now, probably has 20 hours of use so far, it has relpaced a Musiland Monitor 01 USB. I'm finding the DI passes...