Adobe® Flash® CS3 Professional offers several ways to use sound. Make sounds that play continuously, independent of the Timeline, or use the Timeline to synchronize animation to a sound track. Add sounds to buttons to make them more interactive, and make sounds fade in and out for a more polished sound track.

There are two types of sounds in Flash: event sounds and stream sounds. An event sound must download completely before it begins playing, and it continues playing until explicitly stopped. Stream sounds begin playing as soon as enough data for the first few frames has been downloaded; stream sounds are synchronized to the Timeline for playing on a website.

If you’re creating Flash content for mobile devices, Flash also lets you include device sounds in your published SWF file. Device sounds are encoded in the device’s natively supported audio format, such as MIDI, MFi, or SMAF.

You can use shared libraries to link a sound to multiple documents. You can also use the ActionScript™ 2.0 onSoundComplete event to trigger an event based on the completion of a sound.

You can load sounds and control sound playback using prewritten behaviors or media components; the latter also provide a controller for stop, pause, rewind, and so on. You can also use ActionScript 2.0 or 3.0 to load sounds dynamically.

For more information, see attachSound (Sound.attachSound method) and loadSound (Sound.loadSound method)in ActionScript 2.0 Language Reference or Sound class in ActionScript 3.0 Language and Components Reference.