Gnac – Easy-to-use audio conversion program
Gnac is an easy-to-use audio conversion program for the GNOME desktop. It is designed to be powerful but simple. It provides easy audio file conversion between all GStreamer supported audio formats.
Install gnac on ubuntu
Open the terminal and run the following commands
sudo add-apt-repository ppa:gnac-team/ppa
sudo apt-get update
sudo apt-get install gnac