Dolby Digital encoding question (soundstorm/x-Mystique/x-plosion)

[cokecan]

ive had soundstorm a couple fo years ago loved that for its DDL encoding, and i also have a mystique at the min that ive had for quite some time.

been havin this convo with my friend about dolby digital encoding and its makin me wonder.

my friends saying that all i got from soundstorm and my mystique is basically pro-logic 2, simply because you cant encode something into dolby digital that wasnt originally in dolby digital (i.e. music etc) which to me seems logical and why dvd's are dolby digital as they were originally encoded into 5.1, but then ive been tryin to explain to him that pro logic 2 and something thats been encoded into dolby digital by either the mystique or soundstorm does sound quite a bit different.

so, am i literally just listening to stuff in pro-logic 2 thats had the dolby digital name gaffa taped over it to disguise it lol or is it somethin else

can someone explain what it is ive been listenin to all this time???

 

[cokecan]

ok so accordin to them webbys, the dolby.com one inparticular, its saying that with the DDL encoding, its actually using the cues in the audio to produce a 5.1 sound from a 2 channel sound, sending the right sounds to the right speaker to match any on-screen action etc according to where the cue's are in the original sound, where as pro-logic 2 afaik just kinda clones the L and R channel in the surround L and R speakers and seperates the lower frequencies for a sub

if i'v eunderstood that right then it is actually dolby digital and pro-logic 2 then???

anyone wanna check that? lol

 

[cokecan]

ah that makes more sence

ok, so i am definatly not listening to pro logic 2 then. good stuff, can go and tell my friend this next time he says anythin

cheers