Normalize-Audio

• normalize-audio(1) audio - adjusts volume levels of WAV or MP3 audio files.
• normalize-mp3(1) normalize-mp3 - adjust levels of mp3 or ogg files by running normalize-audio(1), then re-encoding
• normalize-ogg(1) normalize-mp3 - adjust levels of mp3 or ogg files by running normalize-audio(1), then re-encoding