ABC Amber Audio Converter is a useful utility which helps you convert wav files to mp3 files (or mp3 files to wav files).

The software supports a batch conversion, a run from command line, more than 50 languages. Batch conversion ability allows you to convert a unlimited number of audio files at a time.

Features List:
reads WAV and MP3 files
writes WAV and MP3 files
supports batch conversion
command line support
easy to use and easy to set up
multiple language support
scheduler