The first t:AUDIO element (segment) plays a steady drum beat. Another segment is started on the time line one second after the first. This secondary segment consists of a tempo track that has a very fast tempo. The second segment lasts for one measure. Notice how the tempo changes when the secondary segment is active. This is because the TRANSITIONTYPE attribute on the t:AUDIO that plays the secondary segment has a value of control. A controlling secondary segment can override certain tracks of the primary segment until the controlling segment ends.
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