What is SoX?
Sound eXchange is a command line utility that can convert various formats of computer audio files in to other formats. For example, it can convert a Microsoft WAV file into an Apple AIFF file. It can also apply various effects to these sound files during the conversion. As an added bonus, SoX can play and record audio files on many common platforms. For software developers, SoX functionality is also available as a library.
Comments and Reviews
Said about SoX as an alternative
Command-Line-Tool for audio editing (including Effects) and converting files with ffmpeg