Xpand is a simple Python script with Glade GUI front-end for sox, cdparanoia, notlame, mpg123, and normalize. It uses the compand option in sox to adjust the dynamic range of music so the soft parts can be heard in a noisy environment, such as a car. The volume level can be normalized to a standard level so that music originally recorded at different levels will all have the same volume. Music can be read from an MP3, WAV file, or straight from a music CD and output to a MP3 or WAV file.
