I've spent a few hours researching this online and the best I could find is that ffmpeg can do the trick, but it looks too technical for me without a GUI, and there don't seem to be any well established GUIs to use for ffmpeg. Basically, I just want to convert the DTS-HD MA/TrueHD surround tracks on my small blu-ray (audio) collection so that I can put it on my Plex server and stream it from my Apple TV HD. I have tried using MakeMKV to get the "backup" then use DVD Audio Extractor to make a flac but I'm not clear if the DTS audio in the flac is the DTS-HD MA track or the lossy core. Any suggestions/info/advice would be appreciated, thanks!