Install Audacity in Ubuntu, An Advanced Audio Editor for Linux

Audacity is one of the oldest and advanced audio editors that can be used on a lot of different types of OS other than GNU Linux. Although by default it only supports "Free" formats only, but thanks to the plug-in support, you can easily add the mp3 compatibility and expand its features as well. 

Main GUI

Main features...

*. Supports MP3, OGG Vorbis, WAV and AIFF.

*. Live recording.

*. Encode audio tracks with various changes (low/high bit-rates, etc).

*. Edit - Cut, Copy, Mix tracks graphically.

*. Add effects.

*. Change pitch or speed settings.

*. Record up to 16 channels at once.

*. Play files reversely. 

*. Load Raw audio files.

*. Various audio analyzing methods (Spectrograms, etc).

So, if you run Ubuntu and want to install Audacity using daily build PPA channel, then open the Terminal and issue the below command.

    sudo add-apt-repository ppa:audacity-team/daily

    sudo apt-get update

    sudo apt-get install audacity