Practicing Social distancing to Covid-19 and i found some oddities under the hood of my DAW.

The computer is a ROG Strix X399-e Gaming. Ryzen 12 core, 12 threads, used as a DAW. Debian Buster got installed mid October 2019 and it got upgraded to Bullseye recently. In October 2019 i hand copied Firmware to Realtek 8822 to place to get wifi working and compiled a 5.4.* (i think) rt-kernel for the DAW.

Now i found out there is two firmware trees. /lib/firmware and /usr/lib/lirmware. I suspect one is from Buster and the other from Bullseye.

I have at least three questions about the firmware.

Which tree is the correct one for Bullseye /lib/firmware?

Debian have several firmware packages. Non-free, firmware-realtek, firmware-something... Is a firmware tarball at kernel.org what Debian split up to different .deb packages?

Can i uninstall all the .deb firmware packages and untar a firmware tarball from kernel org to the right place /lib/firmware?

If someone wonder why i am going with the newest kernels. Because i can . With kernel 5.4-rt the DAWs best latency was 20 ms with xruns. With kernel 5.5 kernels compiled low-latency desktop , latency 1.3 ms, fewer xruns. Kernel 5.6, latency 1.3 ms, no xruns. I have questions about that too, but on another forum.