AIDAC - Permanent Appeal 
Entreaty from the Association of Italian Translators for Cinema and TV, regarding the liberties frequently taken in audio dubbing today.
http://www.italway.it/cinema/appeal.htmlSyncronizing Sound and Vision 
Collection of frequently asked questions based around 'lip sync' and other audio/visual syncronization used in filmmaking.
http://users.aol.com/fmgp/faq.htm
HowStuffWorks: How Movie Sound Works 
Illustrated narrative explains analog and digital sound systems, Digital Theater Systems (DTS), Dolby Digital and Sony Dynamic Digital Sound (SDDS).
http://www.howstuffworks.com/movie-sound.htm