Set the media playback rate.
First available in version 3.0 build 2039.
rate - The rate is a multiplier value that allows you to play the clip at a faster or slower rate. The default value of 1.0 indicates the authored speed. A playback rate of 0.5 is half the normal speed and 2.0 is twice the normal playback speed.
No output parameters.
When this method is called synchronously, a return object containing the output parameters is returned to the caller immediately.