Casio LK-40 User Manual page 41

I LOCAL CONTROL (Default: on) /GM mapping (Default: off)
This setting determines whether or not the keyboard and sound source of this
keyboard are connected internally. When recording to a computer or other external
device connected to this keyboard's MIDI IN/OUT terminal, it helps if you turn
LOCAL CONTROL off.
on: Anything played on the keyboard is sounded by the internal sound source and
simultaneously output as a MIDI message from the MIDI OUT terminal.
oFF: Anything played on the keyboard is output as a MIDI message from the MIDI
OUT terminal, without being sounded by the internal sound source. Turn LO-
CAL CONTROL off whenever you are using the MIDI THRU function of a
computer or other external device. Also note that no sound is produced by the
keyboard if LOCAL CONTROL is turned off and no external device is con-
nected.
Sound Source
LOCAL CONTROL On
Notes played on the keyboard are
sounded by the internal sound source
and output as MIDI messages from the
MIDI OUT terminal.
478B-E-041A
MIDI OUT
LOCAL CONTROL Off
Notes played on the keyboard are out-
put as MIDI messages from the MIDI
OUT terminal, but not sounded di-
rectly by the internal sound source. The
MIDI THRU terminal of the connected
device can be used to return the MIDI
message and sound it on this key-
board's sound source.
MIDI THRU MIDI IN
MIDI OUT
MIDI IN MIDI OUT
Sound Source
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