(Rpi4) Crackling sound when video has HD resolution

This occurs with Internet streaming, PVR for terrestrial TV signal, and local files.
When media is 1080p this occurs with ALL contents and even many video frames are lost. When media is 720p sound issue occurs most of cases and noise is not so intense. It never occurs with DVD resolutions or lower (any source).

I’m now trying this as a workaround:

How to boot to USB RAID - Raspberry Pi Forums

But I have this difficult:

How to boot with initramfs on Raspberry Pi 4