Instrument Track MIDI Output
Pro Tools | First lets you assign specific MIDI ports and channels to an Instrument tracks’ MIDI output. The default selection of none sends MIDI data to no device, port, or node on any channel. Use the MIDI Output selector to specify a MIDI port and channel for output.
Channels in use by another track input appear as bold in the MIDI Input pop-up menu.
To assign an Instrument track MIDI output:
Click the track’s MIDI Output selector and assign a port and channel for MIDI output. Channels already assigned to another track appear in bold.