Pro Tools provides powerful MIDI sequencing capabilities. You can record, enter, edit, and play back MIDI data on Pro Tools Instrument and MIDI tracks. These actions can be done in the Edit window, the MIDI Editor window, the Score Editor window, and the MIDI Event List.
MIDI data in Pro Tools can be anything from MIDI note data (note number, on/off, velocity) to System Exclusive (Sysex) messages. MIDI data can be recorded or played back from both external MIDI devices with a MIDI interface (such as the M-Audio MIDISPORT or Mbox Pro) and other MIDI software (such as instrument plug-ins and ReWire client applications).