A Sync Track is
a one measure sound clip that is recorded at the same tempo as the Sound
Family. It is a multiple in length of every component (layers and chunks)
in a Sound Family. It also has an audio spike at the beginning of the
clip, which acts as a visual reference to help synchronize audio components.
By inserting this low-resolution clip throughout the length of your movie
soundtrack with a SYNC SETTING of STREAMING, we can force Flash's frame
rate to be constant and determine when to trigger the next chunk.