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Chapter 13. Using Sound in Flash > Streaming versus Event Sounds

Streaming versus Event Sounds

Sounds in Flash can be either streaming sounds or event sounds. When you stream a sound, you lock it to the timeline. That means that the sound plays frame-by-frame and forces any animations to keep up with it. If the animation can’t render fast enough, frames of the animation are skipped. The downside of this is that your presentation can get jumpy. The upside is that you can use streaming to synchronize your animation and sound. A general rule of thumb to keep in mind is this: If you’re going to stream your sound, keep your animation simple.

Streaming sounds begin to play as soon as enough frames of the sound have down-loaded. If a streamed sound is longer than the timeline it’s in, the sound is cut off. In terms of behavior in the timeline, streamed sounds are like graphic symbols—they are tied to the timeline.


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