Why is the KPA creating a weird phasing sound ???

Guys, right up front I need to disclose that I haven't yet had time to fully look into the following problem as I was in a rush to get home tonight. But I wanted to try and get some input before I go back to the studio on Monday...

I am hearing some totally weird, subtle phasing-like sound in the very top end of KPA tracks, guitar and bass both. It's not obvious when listening to a track by itself but becomes more apparent in the song. I've heard this before but was never able to quickly figure out what it was. It is ruining the tracks. Do you guys have any idea what may be causing this? Some setting in the KPA or maybe an interaction with something else? Sounds like a drunk mosquito flying around in the song is best way to describe it, and it seems more apparent if there is even the slightest amount of fret buzz going on.

I have no extreme settings dialed on the KPA, nor any effects. Just straight-up medium-gain amp profiles.

Sonic

I'm using SPDIF out, left side for guitar, right for bass when recording. I don't think they are set to mono (if that's even possible) but I will check....

No effects are on.

IIRC, distortion sense in Input section is 3.0, clean is 0.0

Quote from Robman

High output pups on the guitar ?

Nope, moderate output similar to PAF type but a bit hotter. Not as hot as something like a Super Distortion.

Quote from billruppert

We cant tell unless you post some examples.

Am hoping somebody may already know what this issue is about, that's why I'm getting ahead of things. If nothing comes to light by Monday then I'll try to get a sample to bring home and post.

I think you guys are likely onto the problem areas, if it isn't in the signal itself then it is probably attributed to either the signal pathing or clock.

Answers to questions so far:

- The KPA is set to Master Stereo for all outputs. And no Space is enabled anywhere.

- Yes, there are both SPDIF and analog connections from KPA to DAW.

- Yes, project is definitely 44.1kHz

I have one theory so far: Maybe someplace in the DAW interface, or within the project, the analog input is open as well, and white noise from whatever rig is enabled is bleeding in, which is somehow causing a phasing effect in the top end gain/white-space once I play back the song. That's about the only thing I can think of short of the problem being actually IN the signal from the KPA itself.

Sonic

Quote from Dean_R

Unplug the KPA and plug any other modeler you have to insure that certainly the problem is from the KPA and not from something else in the connections/signal. If the problem persists with the other modeler, then you know the problem is somewhere less in the signal path.

Nothing else external to the DAW is on but the KPA. Right before I left Friday I turned the KPA off and rebooted the system and didn't seem to be getting the noise any more at that point.

Quote from Dean_R

Does that mean that problem was solved by a reboot of the KPA?

No, sorry, I should have been more clear. I shut off the KPA and then rebooted the DAW, with the KPA remaining off.