Supreme Commander Forged Alliance Gigabyte Z390 Auros Master Fraps recording and crackling audio

When I record fraps video of Supreme Commander Forged Alliance, the video ends up with crackling audio. This happens whether the CPU or GPU is overclocked or not. My old Asus motherboards never did this. DPC Latency monitor says everything is fine during recording

Windows 10 build 2004
Gigabyte Z390 Aorus Master bios F11c

i7-5960X vs i9-9900KS Satellite Reign startup time

Here I filmed my PCs loading Satellite Reign. Even though I use the very same Samsung 850 EVO SATA SSD, the new system is considerably faster. I’ve seen this in other games too, maybe I’ll make more game loading time videos.

Specs follow:

i7-5960X @ 4,375GHz
32GB RAM @ 3GHz
GeForce GTX 980 Ti
Samsung 850 EVO SATA
Asus Rampage V Extreme


vs

i9-9900KS @ 5,1GHz
32GB RAM @ 4,1GHz
GeForce RTX 2080 Ti
Samsung 850 EVO SATA
Gigabyte Z390 Aorus Master