Over Christmas (of course) I started getting a nasty cracking sound on my output. It seems to mostly kick in on bass-low mid frequencies.
Are my DACs dying I wonder?
Some more details:
I checked all wiring, amps, speakers etc. Finally just had XITE XLR outputs going direct to mixer (checked on speakers and headphones) and the crackling is there, so I think I've isolated it to the XLR outputs. I have tried the XITE-1 headphone output and that sounds clean, so I think that eliminates any driver issue as it sounds OK there. I tried both ASIO drivers from Studio One and the wav drivers with sources like YouTube. Both crackle, which makes me think it isn't a DAW software issue (I thought it might be Studio One at first).
I tried reinstalling latest SCOPE from scratch, tried higher and lower ULLI settings and also tried turning the XITE of and on again

Anything else I can try to isolate the problem? I don't want to send this back to Germany (which is uber-expensive) and find out it's OK.
This is a new computer this year and has been fine.
Windows 11 (latest)
Studio One v6.5 (latest)
XITE SCOPE 7 (latest)