Well, it's not like there's a choice. The disc has either TrueHD or DTS-HD MA, never the same audio track in both. If you get rid of the TrueHD, you're left with Dolby Digital (AC3), which is 640 kbps at most. Haven't done enough tests to see if I can tell a difference between Dolby Digital and Dolby TrueHD, but even if I couldn't I'd probably still keep the TrueHD, just in case I can't tell that I can tell the difference, maybe at louder spots in the movie I didn't check. Those files are huge, though. I've seen some TrueHD tracks with bitrates over 9,200 kbps, especially Atmos. Games have the benefit of just being downloaded, so the devs have no excuse not to include compressed options.I’ve always gotten the impression DTS-MA was higher quality than True HD. It seemed usually I had to turn the volume up a couple notches higher with the latter, and judging purely by bit rate it always fell short.