- streamID
- a streamID returned by the play() function
- rate
- playback rate (1.0 = normal playback, range 0.5 to 2.0)
Change playback rate. The playback rate allows the application to vary the playback rate (pitch) of the sound. A value of 1.0 means playback at the original frequency. A value of 2.0 means playback twice as fast, and a value of 0.5 means playback at half speed. If the stream does not exist, it will have no effect.