OMS was the standard back in the day. (Opcode Music System, later Open Music System). Stable, reliable, easy to set up.
If you are working entirely inside one program though, Logic and/or Cubase will also handle MIDI routing internally.
Apple MIDI Manager was a mess. Avoid.
If you are working entirely inside one program though, Logic and/or Cubase will also handle MIDI routing internally.
Apple MIDI Manager was a mess. Avoid.