[brazen1]

Normal Kodi Build is working with external player (madVR included) or internal Kodi Player (v19.x) without madVR with new nvidia drivers.

So now that you repeated my post in your own words advising me to read before I post, perhaps you understand your original misleading reply is not the "Only Solution" as you wrote.  External player(s) is/are not an option for user @ashlar.  Evidently either is DSP anymore.  But there is a solution for him you see.  Official Kodi and its internal VideoPlayer     Fwiw, madVR is worthless when passing through 2160p HDR on a 55" or 65" C1 and other larger displays unless whatever is being used can't tonemap or scale very well on its own.  It used to be necessary right up until the Kodi internal VideoPlayer was upgraded years ago for users just like ashlar imo.  Me too.  DSP isn't necessary under those circumstances either.  I encourage anyone experiencing DSP problems to revisit official Kodi.  You may find out you don't need DSP, madVR, LAV filters, etc.  Still, as I wrote, they are nice to have on the side when/if needed.