Install librubberband2 by entering the following commands in the terminal:
sudo apt update sudo apt install librubberband2
Description:
audio time-stretching and pitch-shifting library
Rubber Band is a library and utility program that permits you to change the tempo and pitch of an audio recording independently of one another.
Homepage: http://www.breakfastquay.com/rubberband/
Version: 1.8.1-7ubuntu2
Section: universe/libs