Changes the pitch median and the pitch variation of each selected Sound.
Pitch median (Hz): the desired median pitch of the new Sound. A value of 0 will leave the median pitch unchanged.
Pitch variation (%): the scaling percentage of the pitch contour around the new pitch median. A value of 100 will leave the pitch variation unchanged, 0 monotonizes the new sound to the new pitch median, 200 doubles the pitch contour, and negative values do the same but inverting the pitch contour.