It continues playing until explicitly stopped. Streaming sound begins playing as soon as enough data for the first few frames has been downloaded. It synchronizes the sound to the Timeline for playing on a web site. Streaming sounds are best for long background sounds. When a movie is downloading from an Internet source, a streaming sound can begin playing as soon as a small portion of the sound has been downloaded.
Event sounds are most useful for buttons.
In many cases you want a button to move the movie to a new scene, but you don't want the button sound to stop playing abruptly when the scene switches as it would if you used a streaming sound. Procedure for Adding Streaming Sound 1. Create a separate layer for your audio. Create a keyframe where you want your audio to start. Access the Frame Properties dialogue box and select the audio file you will use from the Sound drop down list on the Sound panel.