Compression and Sound Files

After you have the sound effects added to your movie, you can then set the type and amount of compression for all sounds in the movie. Flash applies different compression formats to sounds and images when the movie is published or exported. Five compressions formats exist for sound—Default, ADPCM, MP3, Raw, and Speech. When you export or publish the movie, you apply one of these formats to all the sounds used in the movie either individually or globally. The generated SWF file of the movie now has a compressed version of all the sounds in the movie based on your compression settings.

To apply a compression format to an individual sound, you open the Sound Properties dialog box by double-clicking the sound symbol in the movie’s library (see Figure 12.7).