applies periodic pitch modulation to the audio file.
Sweep Depth: The depth of the vibrato effect, in percent. Varies from 0 (no effect) to 100 (maximal effect).
Sweep Frequency: The certain frequency of the vibrato effect, in hertz.
Sweep Phase: Phase of delay, in radian (0-360)
How to use
-Left-click-and-drag on the select a portion of the audio
-Click Effects menu and select Vibrato
Tip: Vibrato equals a cyclical changing of certain frequency of input signal.