Gnormalize is a front end to normalize, a ripper, an encoder, an audio converter and an audio player. it uses gtk2-perl.

gnormalize decodes the mp3/mp4/mpc/ogg/ape/flac file to wav, then normalizes the wav to a targeted volume level and re-encodes it. gnormalize can also rip, encode, convert audio format between mp3, mp4, mpc, ogg, ape and flac, play audio files, change the encoding and tag properties of final normalized files.