Install vocproc by entering the following commands in the terminal:
sudo apt update sudo apt install vocproc
Description:
LV2 plugin for pitch shifting and vocoding
VocProc is a LV2 plugin for pitch shifting (with or without formant correction), vocoding, automatic pitch correction and harmonizing of singing voice. . This package contains the vocproc LV2 plugin.
Homepage: http://hyperglitch.com/dev/VocProc
Version: 0.2.1-2
Section: universe/sound