Latest data for Hammond and Leslie
XK-4
HAMMOND XK-4 Updater Release1.2
Updated Areas：
1) Fixed a problem that occurred when a note lower than the lowest note of the XK-4 keyboard was input from MIDI IN.
2) Improved the sound quality of Vibrato Chorus.
A USB Flash Drive is required for the update.
Please refer to the XK-4 owner's manual for information on how to update the software.
xk4_release12（8 MB）Download（04/02/2026）