Max for Live device for routing MIDI I/O in audio tracks for audio effect devices or plugins which have MIDI input.
https://maxforlive.com/library/device/7509/midi-router
MIDI Input Type
Selects MIDI input type from MIDI tracks or external MIDI devices. Just like 'MIDI From' of MIDI tracks.MIDI Input Channel
Selects MIDI Input Channel from selected input type above.
Available only when MIDI Input Type has selectable channels.Send
Switches if the device route MIDI messages via I/O. M4L devices send MIDI messages even if inactive
(imagine normal effect devices in MIDI/audio chain), thus let the Send button off if you want to stop sending messages.MIDI Output Type
Selects MIDI Output type from MIDI tracks or external MIDI devices. Just like 'MIDI To' of MIDI tracks.MIDI Output Channel
Selects MIDI Output Channel or device from selected output type above.
Available only when MIDI Output Type has selectable channels or devices.see Issues