I have two UHD movies and have been playing around with some MKVs. I don't have a way to get them to the new LG OLED 77C9. I have a HTPC but no way to play a UHD through to the TV. I have PowerDVD and it blocks them unless I get a new motherboard with a certain Intel chipset and onboard HDMI out. Lame! So the LG C9 will play the MKVs from and USB device but only the lossy audio tracks. One movie only has the HD lossless track so no audio and the other has two with audio descriptions of what is going on. So I made a new MKV with the audio conversion to AC3 and that worked. I’m trying a new one now with DTS as it goes up to 1.5mbp. Is there a way to do DD+ with it’s higher bit rate? Is there a way to keep the lossless HD track and just add the new DTS or AC3 or DD+ track?