Initializing the Gulbransen KS20
for organ pedalboard use

With sensors temporarily on a table, face up and connected, Power on.
Press Setup button (the tiny clear one to upper right).
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 removed sensors).
Press Key Adjust button again to end calibration.
Press Setup button to leave, then again to return.
Enter 126 (Keyboard Direction, Depends on installation).
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 piano.
Go through each Preset button, all Banks, both L & R sides.
Each time Press the Transpose button, then hit note #84 (C6).
Carefully continue to transpose each preset up 15ma.
You can also choose the output MIDI channel on each preset.
Use the same careful routine, Press Transpose + Patch Change.
This shows the output channel value, Enter new number, hit Value.
Continue methodically for every Preset and Bank.

Now double check that the middle-C sensor #60 plays two octaves up.
Check every Preset (you may have to rechoose the synth patches).

Finally go into organ setup mode.
Press the Setup button.
Enter 130.
Press Value (it will show 0, Enter 1 and hit Value again).
Now get set to play every active sensor, lowest to highest.
Use a steady tempo, one second down, one sec up, continue upwards.
Include all but the top three sensors, even above pedalboard's keys.
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 stored).

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 (#36) standard.

The sensor strip(s) should now be mounted under the pedalboard keys.
When you next power up, go through the Key Attack setup once more.
Just ignore the unused (and removed) sensors, but do the upper strip.
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 value.
The response curve will have to be trimmed to one of the best versions.
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 used.)
Usually Preset button #1 will be assigned a Patch Change of 0.
This can be defined as a "silent" patch/program, so pedals can be muted
(or just repress the active preset(s), leaving all their LED's off).
Both sides can choose sounds at the same time, like organ stops.
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 occasionally.

Avoid any further Transposes -- you may have to do this all again!
Be sure the strip has been cut and installed properly, travel distances
tweaked according to the installation instructions, and that no sensors
are held down, or caught in between keys, to be bent or broken off.
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 use.

--Wendy Carlos
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Wendy Carlos, KS20 Init