Logic

MIDI IN

1. Add plugdata to an empty MIDI track.
2. In plugdata, use one of the MIDI IN objects and route MIDI data from it (see example).
3. Play notes on this MIDI track using any usual method — keyboard, piano roll, etc.

MIDI OUT

1. Add a new Software Instrument track. Load an instrument to which you want to send MIDI data (a).
2. In the Mixer view (press X to toggle), add plugdata-midi Audio Unit plugin as a MIDI FX (b). Alternatively, use the Inspector view (press I to toggle).
3. In plugdata, use one of the objects that sends out MIDI data (see examples)

FX

1. Add plugdata-fx as an Audio FX to an audio or MIDI track.
2. In plugdata, use [adc~] object to receive audio from your DAW (see examples).