Convert between SMF (Standard MIDI File) and RMID (RIFF MIDI) format
smf2rmid and rmid2smf are two command line utilities that let you convert between SMF (Standard MIDI File) and RMID (RIFF MIDI) format. An RMID file is merely a wrapper around a Standard MIDI File; the original file is unmodified.
GNU/Shoes is a wrapper for the Sox audio utility. Written in Perl for Linux and Win32, GNU/Shoes aids the tedious process of converting large numbers of audio files, and provides Jabber messages to notify the user that a batch is complete.