The playback speed of the Fast Forward and Rewind buttons is controlled by these values. A value of 1.00 is normal speed. Entering a value of 3.00 for Rewind speed, for example, means the Rewind button will play the sound backwards three times faster than normal. By entering small numbers (such as 0.1) the Rewind and Fast Forward buttons will play very slowly. This is useful for finding pops or clicks, since the visuals will move slowly through the audio.