I'm using a desktop, win7-64bit, Intel based...
When the desktop is first booted everything is fine, the fireface is connected, no high pitch noise.
Then when I start any audiosoft, a high pitch noise is produced, it is very low in volume and when
playing some sound it is not noticable... But when stopped and the audio application is still active,
it is there.
When I quit the audioapplication the noise stops.
The noise is on all outputs of the fireface, analog and digital
This is only the case when the fireface is connected via USB
When connected via firewire, there is no noise and everything works fine.
So now I have the fireface connected via firewire, but I would like to go via usb ...
I also have a macbookpro, I'll try later today if the same thing happens there...