Use the following sysex messages to turn Local On or Off from an external MIDI
device:
Off: F0 41 01 3E 12 B1 7A 00 55 F7
On: F0 41 01 3E 12 B1 7A 7F 56 F7
device:
Off: F0 41 01 3E 12 B1 7A 00 55 F7
On: F0 41 01 3E 12 B1 7A 7F 56 F7