I have Sony UBP X800 and as you know it doesn't support playing atmos and true hd from MKV files. I found the guide https://forum.videohelp.com/threads/376387-Help-converting-burning-DolbyHD-7-1-Atmos-b...-rays-from-MKV how to make it work, but I would like to ask if how could I make MKV with just downscale audio so it won't be atmos, so that my player can play it? I liked the guide but since I don't have atmos system it's really no use to me, so I would rather have it stereo so that my player can play it without any problems. Oh and I should mention this is for 4K videos and those already have atmos.