an easy and consistent way of installing software ported to FreeBSD
pkg-descr
Normalizes the volume of mp3 and AAC (mp4/m4a/QuickTime) media files
WWW: http://altosdesign.com/aacgain/
FreeBSD
FreeBSD is a Unix-like free software operating system descended from AT&T UNIX via the Berkeley Software Distribution (BSD) branch through 386BSD and 4.4BSD.