Quick audio encoding question

Soldato
Joined
5 Feb 2006
Posts
3,524
Im currently backing up my Lost DVDs and i was wandering

what is the difference between using AC3 passthru ( what ever that means ) vs. mp3 mixed down to dolby prologic ( thats what my decoding box accepts via optical )

I had originaly done some tests and found out that my PS3 likes to accept the AC3 version. But since ill be picking up a PCH soon then i might be able to keep it as mp3?

I ask because my target size is set to 400mb and when i select AC3 it really affects the bitrate ?

Thanks in advance :D
 
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