Pro Tools lets you assign specific MIDI ports and channels to a MIDI track input. The default selection of All receives all incoming MIDI data from all ports on all channels. Use the MIDI Input selector to specify a MIDI port and channel for input.
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For information on assigning MIDI input to Instrument tracks, see Assigning MIDI Input and Output for Instrument Tracks.
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Click the track’s MIDI Input selector and assign a port and channel for MIDI input. Channels already assigned to another track appear in bold.
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In the Edit window, select View > Edit Window > I/O to access any track’s Input selector.