Lots of problems here. You are not using HDMI, so you are not getting the best sound anyways. Your set up can not decode TrueHD so you are getting a more compressed core sound setting.
BIT FOR BIT TrueHD, DTS-HD MA, and PCM should sound the same. Yes PCM is uncompressed and the best audio. But the others are compressed LOSSLESS formats. While their may be some discrepancy, all the data is there to have something that sounds as good as PCM. The manner to which it is decoded can result in some differences, but overall they should be very very close. In fact I doubt anyone where could identify the differences in a blind sound test.
Also, some movies have better sound tracks than others. So any test done would have to be with the exact same source.
TrueHD and DTS-HD MA are better than PCM imo. WHY? Simple. While PCM is pure lossless sound, it is also uncompressed meaning it takes up more room on the disc. With TrueHD and DTS-HD MA, while they have to be decoded (and that can be an issue), they take up less space allowing for a better encoded video and/or more extras. They all sound great. Any differences between them are so minor in the end, that the benefits of a compressed lossless format outweigh the problems. Once again, imo.
|