I should mention at this point that at least one working Hollywood sound mixer has voiced his opinion that, when played back on his professional dubbing stage, well-mastered Dolby Digital Plus soundtracks encoded at the high 1509 kb/s bit rate that Paramount uses can be audibly transparent to the studio masters, when tested on movies that he mixed himself and would presumably know better than anyone else. But what use is the informed opinion of an expert in the field when it's easier to just point to the specs list on the back of a disc's packaging to make conclusive statements about matters of quality? In the forum on this site, a number of readers have made proclamations such as, "Compressed audio is just not acceptable these days" and "Whether you can tell the difference or not is irrelevant."
The disc's audio being indistinguishable from its studio master is "irrelevant"? Even with just a Dolby Digital Plus track, the 'Transformers' disc rated the highest score for audio quality that we can give. What more could we demand from it? It's absolutely terrific, but it's just not absolutely terrific enough if the packaging doesn't have a listing for TrueHD or PCM, even when it's likely impossible for human ears to tell the difference? What kind of argument is that?