Install gtkguitune by entering the following commands in the terminal:
sudo apt update sudo apt install gtkguitune
Description:
Guitar and other instruments tuner
gtkGuitune is a Linux program for tuning guitars and other instruments by using the method of Schmitt-triggering, i.e. counting the number of triggerings between two trigger levels in a certain amount of time.
Version: 0.8-6ubuntu3
Section: universe/x11