Gents - so I've got my ProFire2626 up and running and my studio room about half assembled, and I'm running into an annoying problem - I'm getting a fair amount of "static" and white noise from my setup now, independent of master volume level. It seems to be related to the presence of wireless gadgets - I'd been using a tethered mouse and a wireless keyboard previously, and I think there was always a faint amount of interference there but I'd just gotten used to it, I guess - now that I'm not, it's jumping out at mew and it's REALLY annoying. There's also a VERY faint high frequency whine.
Any suggestions? Some googling suggests the M-Audio is a bit susceptible to this anyway, so moving to a non-wireless keyboard and mouse setup would likely help, but it should be possible to work around a little. It certainly could also be the Yamahas - would getting them and the M-Audio on to a separate power supply from my computer help here? Also would using better cables from the M-Audio outs to the Yamaha ins help somewhat? They're short generic 1/8" patch cables - I need to use an 1/8" out of the ProFire but could run a XLR into the HS80s. Would using some sort of non-conductive washer between the body of the M-Audio and my desk rack help?
Luckily even fairly modest volume mostly masks the hiss, but I'd love to get rid of it, obviously.
EDIT - seems to also be related to my comcast router, so moving THAT to a different location and a different power source would probably help.
EDIT #2 - almost certainly not the Yamahas - if I leave them on but unplug the cables running from the ProFire, the static goes away.
EDIT #3 - house's power is fine - my amp sounds fucking awesome in the room, no extra hum.
EDIT #4 - whatever it is is only on playback, not record, and only over my monitors - through 'phones, with the headphone volume cranked, it's dead silent. This sort of leads me to suspect my cables - I wouldn't think instrument cables would be a major issue, though...?
EDIT #5 - seems worse on the right speaker side, though independent of whether or not the right hand speaker is receiving the left hand signal or not from the Profire. Swapping out patch cables didn't make a difference.
How are your power cables routed? Are they all into a power strip, or are they on separate circuits? Sounds like it could be a ground loop.
Edit: I have a spare 1U rack power strip if you need it.