# Working with real-time MIDI

While ARIA is useful for playing MIDI files on a 3DO Station, you will find it even more helpful for editing MIDI files in real-time. Since the actual process of editing the MIDI files depends on the sequencer you have available, this section only gives a brief overview of the process:

- Connect the Output of the MIDI sequencer to the Input of ARIA, using the Apple MIDI Manager's PatchBay application.

- Load the MIDI file you want to edit into the MIDI sequencer (or start composing a new document).

- Make sure a MIDI project document is the topmost document in ARIA.

- Make sure there is a PIMap in the MIDI project window and that the PIMap is loaded into 3DO memory (see Playing a MIDI file on the 3DO Station.)

- You do not need to attach a MIDI file to the MIDI project document; MIDI is interpreted in real-time from the sequencer or keyboard.

  Note: Running real-time MIDI is more reliable if the MIDI Manager Patchbay application is up and running before any of the other programs are launched.

#