ReZound aims to be a stable, open source, and graphical audio file editor primarily for but not limited to the Linux operating system.
Download it here.
I use it as often as I use Timemachine to adapt audio files in a suitable format and to add some final effects .
$ ./configure --prefix=/usr --enable-largefile $ make $ su -c "make install"
$ cd /usr/src/ $ wget http://www.esaracco.fr/downloads/rezound-0.12.2beta-64-bit.patch $ cd rezound-0.12.2beta/ $ patch -p0 < ../rezound-0.12.2beta-64-bit.patch