Ur824 crackling noise, red SIG/PEAK, input 1-2 peaking

I tried to locate some other threads where the same issue is described:

https://gearspace.com/board/so-much-gear-so-little-time/848256-rig-making-infrequent-loud-crackling-noises-2.html
https://modwiggler.com/forum/viewtopic.php?t=192972

I don’t know the answer but hopefully these might give ytou an idea about identifying the issue. Hope you get it sorted. it’s a good interface.

You might also might want to describe all the aspects of your system including your computer specs, operating system version and Nuendo version etc., just so others can help you out.