As you may know, Audio Recorder is a nice software for recording music to audio files. It is capable of using the system’s card, microphone, and other devices with microphone. As output, it has support for the most popular audio formats, like: OGG, FLAC, MP3 or WAV.

The latest version available is Audio Recorder 1.7.5, which has been recently released, coming with a bunch of changes.
Installation instructions:
Up to date packages are available via some third party PPA, so installing the software on Ubuntu 15.10 Wily Werewolf, Ubuntu 14.04 Trusty Tahr, Linux Mint 17.x and Elementary OS 0.3 Freya systems is easy. You need to add the PPA to your system, update the local repository index and install the audio-recorder package:
$ sudo add-apt-repository ppa:audio-recorder/ppa
$ sudo apt-get update
$ sudo apt-get install audio-recorder
Optional, to remove audio-recorder, do:
$ sudo apt-get remove audio-recorder