Originally Posted by Dingane Walker
I did another test today by ripping Poltergeist 2's DD 2.0 Pro Logic Track in DVD Audio Extractor & then converting it to FLAC using Foobar2000, & let me tell you it blew my socks off. That movie has a really Dynamic sound mix!
The DD tracks converted to wav/mp3/flac/vorbis sound better, louder, & more dynamic than the original file!
What is "the original file"? How did you perform the comparison? What decoder was used, and how were the levels matched?
Since Foobar converts AC-3 to WAV, the best comparison to "the original" would be with the WAV file. FLAC is allegedly lossless so it should not alter the result. The same cannot be said about MP3 and Vorbis.
If the Foobar decoded file sounds different in dynamics, maybe it is some error in how Foobar decodes DD audio that causes the change in sound. It is, after all, not a Dolby certified decoder.
The audio conversion programs strip all of the metadata/Dialnorm/DRC used on Dolby Digital tracks.
Why do you think that? Does Foobar say this somewhere?
I have read that Dolby's Cinema Processors (the ones used for 35mm DD which is only 320kbps for all five channels) Ignore's dialnorm/metadata etc, so you get the same exact sound levels as the original mix.
Dolby's cinema processors do not ignore dialnorm/metadata. It simply does not exist in the Dolby cinema format.
If i could get my hands on one of their Cinema Processors, I would be one happy man.
They are sold on the open market. But just in case there is any confusion, if you were to feed it a DVD with a DD soundtrack, it would output the exact same audio as the DVD player itself.
Why did they think that Dialnorm/DRC on home media was such a good Idea? they should have given us consumers the ability to turn off all Metadata/Dialnorm/DRC settings.
DRC is user defeatable in most products. Dialnorm imparts no sound of its own.
.Edited by Roger Dressler - 1/14/13 at 2:16am