* An add-on architecture for processing MIDI and performing MIDI effects. Change a track's velocity, apply echo, add chorus, change its key signature, etc.
* MIDI processing is integrated with editing: Paint with echo effects, paint chords in key, etc.
* Easily rearrange songs with familiar phrase operations.
* Customize your interface with skinning.
* Achieve special effects with tool properties: Turn on gradual delete and slowly rub out MIDI events.
* Record, edit, and playback note, program change, control change, and pitch bend MIDI data.
* Read and write standard MIDI files.