Could it be pickup related? Sounds like hum from an amp that's in idle, the Kemper doesn't normally do that.
Maybe this sounds stupid but have you also tried different guitar cables...?
I have a similar issue, but yours sounds constant, while mine only comes in while playing.
Do you have any noise gate on at all in your clip?
If you unplug your instrument cable from the front, does it still make noises?
yes, that noise at the end sounds very similar to no_dice's issue. It seems to me like the Noise Gate can do some nasty things on certain tones. What's it sound like when you turn it completely off (turn it full left)? (Also, keep in mind the Noise Gate setting is saved per rig, not globally, unlike Clean/Dist Sense).
i know you say you've tried everything, but have you specifically tried Guitar > Kemper > Headphones, with nothing else hooked up, eliminating the possibility of a ground loop (although I think the hum would be lower pitched in that case)?also, different cable as mentioned above?
Sounds like a ground loop to me.
What did you have the noise gate set to in your clip? It sounds to me like no noise gate was on at all.
noise gate at 5 seems quite high to me. I have mine at around 1.6 usually. If I need a tighter feel, I use a 2:1 or 4:1 gate in slot A.
also, can you reproduce the noise on any profile, or is it specific to certain ones. So far I've only been able to reproduce no_dice's issue on a patch where Definition is set to 10 and it has a Green Scream in front with Tone max'ed (anything right of center/0 is max'ed). Obviously, that's a very filtered sound, which tends to increase the noise floor.
That's some edgy tone ya got there! That much top end would certainly emphazize noise. That said, the noise you hear in the sustained chord at the end doesn't sound like a regular buzz issue (shielding, ground loop etc). Do you have the attack parameter turned up?
Ideas for trouble shooting (but I'm not sure if these will help since you said you've tried in multiple locations and all profiles do it):
Have you got anything else plugged to the same outlet as the Kemper, like external hard drives, computer monitors etc? Is there a compressor anywhere in your chain? (Compressors will raise the noise floor). Try using just one short, good quality (like Spectraflex etc) cable guitar->Kemper to see if this helps. Did the places where you get hum have fluorescent lighting?
If i unplug no Noise, tried different cables
Maybe it's the global Output eq, cause the presence is At +5
that's quite an extreme setting.
Change it and see if you're results improve.
Changed global Setting to presence 0, Noise is there, very frustrating, cause you spend so much Money And Time in a "Professional"product and it don't still Works flawless
In the last two years I don't recall one other person having the same 'noise' problem you're talking about.
Global Presence on 5 had me scratching my head, now with Presence on 0 the noise is the same?
Changed global Setting to presence 0, Noise is there, very frustrating, cause you spend so much Money And Time in a "Professional"product and it don't still Works flawless
I think it's about time you open a support ticket and sending them a backup.
