The Auto Motion track stores the audio driven motion for the voice clip. Depending on whether the audio data is loaded or not, there can be two types in the track - Auto Motion and Idle Motion.
When audio data is given, the auto motion can be produced under the following situations:



If you apply a designed projects or talking scripts sample, then there will be data stored in the Auto Motion track as well.
If audio data is not available, then the idle motion can be produced under the following situations:





Download and install the bonus pack from the official web site, to get more idle motion styles.