Sweet MIDI Player is a MIDI player for not only auditioning all types of MIDI files, but for modifying the MIDI files themselves. Use its mixer-like interface to easily edit the control messages, transpose the music, change the tempo, mute desired MIDI channels, and save the end results to disk. It also includes a Jukebox function which allows you to create playlists with up to 99 songs. A Mac OS X
version is also available.