Adding Sound > Compressing sounds for export > Guidelines for exporting sound in Flash movies

Guidelines for exporting sound in Flash movies

Aside from sampling rate and compression, there are several ways to use sound efficiently in a movie and keep file size down:

Set the in and out points to prevent silent areas from being stored in the Shockwave Flash file and to reduce the size of the sound.
Get more out of the same sounds by applying different effects for sounds (such as volume envelopes, looping, and in/out points) at different keyframes. You can get a number of sound effects using only one sound file.
Use looping to extract the common part of the sound and play it repeatedly. Loop short sounds for background music.
Do not set streaming sound to loop.