the Gulbransen KS20
for organ pedalboard use
sensors temporarily on a table, face up and connected,
Press Setup button (the tiny clear one to upper
With numeric keys input 51 (= Reset All).
Press Value (lower right) will see 0.
Enter 1 (and press Value again).
(In 4-5 seconds unit is Reset).
Press Setup button again.
Press top center Key Adjust button.
(Central LED's will sequence CW).
Carefully depress every sensor (use opaque card for
Press Key Adjust button again to end calibration.
Press Setup button to leave, then again to return.
Enter 126 (Keyboard Direction, Depends on
Press Value, it will show the Default, =0.
Enter 1 and Press Value again.
Leave via Setup button, Power off then on.
Now check, the keys ought behave normally, as for a
Go through each Preset button, all Banks, both L & R
Each time Press the Transpose button, then hit note #84
Carefully continue to transpose each preset up 15ma.
You can also choose the output MIDI channel on each
Use the same careful routine, Press Transpose + Patch
This shows the output channel value, Enter new number,
Continue methodically for every Preset and Bank.
Now double check that the middle-C sensor #60 plays two
Check every Preset (you may have to rechoose the synth
Finally go into organ setup mode.
Press the Setup button.
Press Value (it will show 0, Enter 1 and hit Value
Now get set to play every active sensor, lowest to
Use a steady tempo, one second down, one sec up, continue
Include all but the top three sensors, even above
When you finish the final active note, Press Value.
Enter 0, and Press Value again to end this function.
Leave via Setup button (Power off and on, to be sure it's
Check that the sensors are behaving normally with Preset
#1, Bank #1.
Note: the topmost sensor will be set by default to the
88th note, C8.
Those Transposes will place the lowest pedal at the C2
The sensor strip(s) should now be mounted under the
When you next power up, go through the Key Attack setup
Just ignore the unused (and removed) sensors, but do the
Go on to fine tune Param #1, #58-61, Attack Velocity, and
add Patch Changes.
Param #1 will probably be best around 7 to 9.
Higher values and the pickups will be too easily maxed
out to 127.
Lower than 5 will prevent reaching the full 127 attack
The response curve will have to be trimmed to one of the
This will look like a steep rise at left, low end, then a
slow rise in the middle.
The upper end can either rise steeply to 127, or just max
out at some value.
Good starting values with Param #1 set to 8 are:
58 = 15
59 = 120
60 = 60
61 = 115
(Note: similar values will work for Release Velocity, if
Usually Preset button #1 will be assigned a Patch Change
This can be defined as a "silent" patch/program, so
pedals can be muted
(or just repress the active preset(s), leaving all their
Both sides can choose sounds at the same time, like organ
You can "double" (couple) the Accomp manual's channel
with the pedals.
Percussion can be added from the right side to pipe ranks
on the left.
Don't forget when first powered up, the KS20 will play
15mb, via Ch. #1.
Press a basic preset button to begin (dbl-press if you
want silence at first).
The left center slider varies left button's level, the
right varies the right side.
It's wise to go through the Key Attack routine
Avoid any further Transposes -- you may have to do this
Be sure the strip has been cut and installed properly,
tweaked according to the installation instructions, and
that no sensors
are held down, or caught in between keys, to be bent or
Much better is to remove the sensors that will not be
active. Just mark
the most centered sensor for each pedal (with a bit of
tape), and remove
the rest. Do that with the two sliding metal rods, the
"nessies" along with
their springs, and store them in a zip bag for future
1998-2008 Serendip LLC. No images, text, graphics or
may be reproduced without permission. All Rights