When idle or even in standby, I can hear a “frying” noise coming from any of the line outputs of the UR824. The noise only disappears when disconnecting the audio cables from the interface, or when disconnecitng the USB cable.
I rebooted the Mac and the UR824, but the noise is still there. It can be heard when no application is running, as well as when there are audio applications running. So, it does not come from some audio application.
I never noticed this kind of noise with my previous interface (MOTU 828mkII FW). Frankly, I’m not even sure I heard it during the first test I did immediately after having installed it. But today I was working with soft-sounding material, and the issue became evident.
The fact that disconnecting the USB cable solves the problem, makes me think there is some clocking conflict between the Mac and the audio interface. Is there any way of diagnosing it?
My Mac is a MacBook Pro Early 2008, 2.4. The UR is directly connected to one of the USB ports, with no hub between the Mac and the cable. The ferrite sleeve is three-four centimeters away from the USB connector on the side of the Mac.
Does anybody else notice this noise?