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Chapter 12. Adding Sound > Compressing Sounds

Compressing Sounds

You can use Shockwave Audio (SWA) to compress all internal sound cast members. You can also link to external compressed Shockwave Audio files.

SWA compression makes sound data much smaller in a movie file—by a ratio of as much as 12-to-1 without noticeable sound-quality loss—which in turn decreases download time and/or disk space. The tradeoffs are that after a movie is downloaded, it may take a little longer to start, because files have to be decompressed, and sound quality can suffer if compression levels are too high. Nevertheless, when your movie uses a great deal of sound, audio compression is a great way to go, especially when you're distributing on the Internet.


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