Hoping someone may have an idea for the solution. Here are two examples of the problem sound:
http://snd.sc/10mlMie
http://snd.sc/13fy7T9
Happens out of XLR/analog outs, SPDIF, and headphone out. Tested all outputs and problem still happens.
I've tried switching guitars, cables, profiles, switching ground button, plugging KPA into elec on another circuit, lowering clean sensi.
FW version 1.8 and I've also tried a system reset. Tried moving the KPA away from LCD's also.
Samples recorded via a Maestro Duet (drivers current) into Macpro running Logic Pro 9 recorded at 44.1 kHz. (Kind of a moot point though since the sound happens via the headphone outs too.)
Thanks for any ideas! (I've already contacted support but haven't heard from them.)