Use the following procedure to check the current ROM version of the VK-77:
1) Turn on the unit on while holding down VIBRATO AND CHORUS UPPER, VIBRATO
AND CHORUS LOWER, and KEYBOARD ASSIGN EXT - UPPER.
2) Turn the unit off to exit.
1) Turn on the unit on while holding down VIBRATO AND CHORUS UPPER, VIBRATO
AND CHORUS LOWER, and KEYBOARD ASSIGN EXT - UPPER.
2) Turn the unit off to exit.