Yamaha A4000 Owner's Manual page 202

UTILITY-MIDI
Knob 5
[ Turn] Recieve Port
Determines which of the A5000's MIDI ports — MIDI IN-A
or MIDI IN-B — will be used for system exclusive data
reception.
[Range] A, B
• This parameter is not available on the A4000.
202
Chapter 8 UTILITY Mode
• A5000/A4000