Combi 4: ed-midi filter2, 1: midi 2-1 (midi filter 2-1), 2: midi 2-2 (midi filter 2-2) – KORG MICROX X50 User Manual
Page 51: X50: 4-3: midi 2-3 (midi filter2-3), X50: 4-4: midi 2-4 (midi filter 2-4), Microx: 4-3: midi 2-3 (midi filter2-3), Combi 4: ed–midi filter2, 4–1: midi 2–1 (midi filter 2–1), 4–2: midi 2–2 (midi filter 2–2), 4–3: midi 2–3 (midi filter2–3)
