Extracting audio soundtrack in chapters

[khafan]

Run dvd decrypter and set the mode to IFO, select your desired chapter/s and goto stream processing tab, enable stream processing and only select & high light the audio track that you want to extract (it should be AC3 track not DTS), in stream section choose "Demux" and press decrypt buttun.

you can convert the AC3 file to whatever format you like with BeSweet. get the BeSweet and BeSweet GUI from download section of doom9.org, you need both of them.