Humming sound while graphics or CPU activity

[naquaada]

I have a problem on my Zotac board with ALC662 chipset and VoodooHDA 2.8.8: Always if I move a window, scroll in Firefox, or if a website takes some time to loud, I get a humming tone in the speakers. Not too loud, but loud enough to be annoying. But that's also on my Gigabyte board and even on Leopard with an M-Audio Transit USB Interface with own drivers. Only Firewire interfaces weren't affected. I'm using a small audio mixer to mix all my output devices.

 

Could you test if your audio device also makes sounds if you work around in your system? Maybe it's neccessary to use a headphone.

 

Greets, naquaada.