ARTISAN CLASSIC ORGAN Classic Organ Works AGO User manual

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Classic ‘AGO’ MIDI
Pedalboard (MPD)
User Manual
Version 1.03.00
A Division of:
ARTISAN CLASSIC ORGAN INC.
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CLASSIC ‘AGO’ MIDI PEDALBOARD
MPD
CONTENTS
CONTENTS................................................................................................................................................2
DISCLAIMER............................................................................................................................................3
INTRODUCTION......................................................................................................................................4
Figure 1: Parts list for the Classic ‘AGO’ MIDI Pedalboard..................................................................... 4
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INSTALLATION.......................................................................................................................................5
Figure 2: Required Connections .............................................................................................................. 5
Figure 3: Analog Inputs........................................................................................................................... 6
CONFIGURING........................................................................................................................................7
Figure 4: Pedalboard Key Map................................................................................................................ 7
Table 1: Functions Accessible with the Programming Push-Button.......................................................... 7
MKSC-4A .................................................................................................................................................10
Description...........................................................................................................................................10
Principal Features.................................................................................................................................10
How it works........................................................................................................................................10
MIDI APPLICATIONS ..........................................................................................................................12
Table 2: MIDI Parameters supported..................................................................................................... 12
SPECIFICATIONS..................................................................................................................................13
Dimensions: .........................................................................................................................................13
Controls:...............................................................................................................................................13
Connections: ........................................................................................................................................13
TROUBLESHOOTING..........................................................................................................................14
DIAGRAMS .............................................................................................................................................15
Figure 5: Silk Screen of the MKSC-4A circuit board............................................................................. 15
Figure 6: MKSC-4A schematic ............................................................................................................. 16
Figure 7: Classic ‘AGO’ MIDI Pedalboard wiring schematic................................................................. 17
Figure 8: Organ Shoe Wiring ................................................................................................................ 18
WARRANTY............................................................................................................................................19

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CLASSIC ‘AGO’ MIDI PEDALBOARD
MPD
DISCLAIMER
Information contained in this user manual is proprietary and is provided solely for the use of customer
information and service. The information contained herein shall not be duplicated, used or disclosed for
design, procurement, manufacturing, or any other purpose, in whole or in part, without the written
consent of ARTISAN CLASSIC ORGAN INC. Information contained in this manual does not
constitute any legal contract.
Although thoroughly edited for correctness, neither Classic Organ Works nor any of their employees
makes any warranty, express or implied, or assumes any legal responsibility for the accuracy,
completeness, or usefulness of any information. Information is subject to change without notice. We
appreciate any comments and suggestions to improve this manual.

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CLASSIC ‘AGO’ MIDI PEDALBOARD
MPD
INTRODUCTION
Congratulations on your purchase of the Classic ‘AGO’ MIDI Pedalboard! This beautiful, deluxe, wood-veneer
pedalboard uses a combination of heel and toe springs to produce an authentic organ pedalboard feel while
conforming to the exacting specifications of the American Guild of Organists. .
Constructed using the classical methods of organ-builders, the Classic ‘AGO’ MIDI pedalboard is also a
technologically-advanced musical device. The pedalboard magnetic reed switches connect to the built-in Classic
MIDI Keyboard Scan Computer (MKSC-4A). The electronics on this board perform MIDI-merge, velocity
(volume level), transpose, and selectable MIDI-channel output functions. Other MIDI devices may be chained
with this pedalboard to produce a single MIDI output stream.
The pedalboard can output notes at different velocity (volume) levels. The transpose function allows organists to
select their preference for the starting pitch associated with the first pedalboard key. A selectable MIDI channel
output allows transmission of MIDI information on any one of sixteen standard MIDI channels.
The Classic ‘AGO’ MIDI pedalboard is shipped fully assembled and requires only MIDI and power connections.
MIDI devices are connected to the ‘MIDI IN’ and ‘MIDI OUT’ connectors using standard MIDI cables.
The Classic ‘AGO’ MIDI pedalboard conforms to the MIDI Manufacturers Association (MMA) specification.
For more information, please visit: http://www.midi.org
Pedal Board with MKSC-4A DC adaptor MIDI cable User Manual
Figure 1: Parts list for the Classic ‘AGO’ MIDI Pedalboard

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CLASSIC ‘AGO’ MIDI PEDALBOARD
MPD
INSTALLATION
The Classic ‘AGO’ MIDI Pedalboard is shipped fully assembled and requires only MIDI and power connections
to operate. The heart of the pedalboard is the MKSC-4A MIDI Keyboard Scan computer which performs key-
scanning, transposition, volume adjustment, and MIDI channel output select. It has a 2.1mm co-axial DC power
connector and two connectors for MIDI input and MIDI output. A picture of the connectors is shown below.
Figure 2: Required Connections
POWER: Plug the 9-Volt DC power supply (included) into the 2.1mm co-axial power connector.
MIDI OUT: Plug the included 6-foot MIDI cable into the MIDI-OUT connector and to the MIDI device that is to
be controlled. MIDI data is output from the pedalboard to other MIDI devices via this connector.
MIDI IN (optional): Plug a standard MIDI cable from the ‘MIDI OUT’ port of another MIDI device into the
‘MIDI-IN’ connector. This connector receives MIDI data from other MIDI devices and re-transmits it through
the ‘MIDI OUT’ port as described above.
SET PUSH-BUTTON: No installation is necessary. The push-button switch is used to configure the pedalboard.
Along with the pedalboard keys, it sets the output MIDI channel, velocity level and transposes the entire
pedalboard up one octave and back to default.

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Remove black cover
to expose analog input cable
Pedalboard w/Exposed Input Cable
Top View
Analog Input Cable Cable is run
through small
notch
Pedalboard
Black Panel View
Inputs
0
1
2
(yellow)
(blue)
(green)
Figure 3: Analog Inputs
ANALOG INPUTS (Optional): An analog input cable is hidden inside the pedalboard behind the black cover.
Remove the black cover and pull the cable out. Run the cable through the small notch (pictured), leaving the 12
pin connector on the outside, and restore the black cover. Plug in analog organ shoes, such as Expression, Swell
and Crescendo as illustrated in schematic on page 18.

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CLASSIC ‘AGO’ MIDI PEDALBOARD
MPD
CONFIGURING
The Classic ‘AGO’ MIDI Pedalboard provides the ability to configure a variety of parameters for its key and
analog inputs. These inputs are configured using the programming push-button (illustrated on page 5) along with
the pedalboard keys.
In general:
1. A pedalboard setting is configured by pressing and releasing the programming push-button, followed by a
press-and-release sequence of pedalboard keys, as defined in the list below
2. Only one setting can be configured per press of the programming push-button
Figure 4: Pedalboard Key Map
Table 1: Functions Accessible with the Programming Push-Button
Setting Parameter
MIDI Function
Defines the type of MIDI
messages sent by the
pedalboard.
1.
Press & release programming push
-
button
2. Press & release Black key D#2 (Key-16)
3. To select MIDI Note On/Off function, press & release first white key
(C1, Key-1) - or -
To select MIDI Program Change function, press & release second
white key (D1, Key-3) - or -
To select Ahlborn Stops Control function, press & release third white
key (E1, Key-5)
4. Press & release black “Enter” key (A#2, Key-23)
To enter default function (Note On/Off) – skip step 3

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Setting
Parameter
MIDI Function Parameter
Sets the base key (C1) value
The MIDI Function Parameter sets
M
IDI Key Number
for
C1
Key if
Note
On/Off function is selected, Program Change Number for C1 Key if Program
Change function is selected and Ahlborn Stop Number for C1 Key if Ahlborn
Stops Control function is selected.
1. Press & release programming push-button
2. Press & release black C#2 (Key-14)
3. Press & release black F#2 (Key-19) and then one of first 13 white keys
to enter ‘Tens’ of C1 Key Number (digits 0-12)
example: For a value of 111, which has eleven tens, hit 12
th
.
white key G2 (Key-20)
For a value of 5, which has zero tens, hit key C1 (Key-1)
4. Press & release G#2 (Key-21) and then one of first 10 white keys to
enter ‘Units’ of C1 Key Number (digits 0-9)
example: For a value of 111, which has 1 unit, hit 2
nd
white key
D1 (Key-2)
For a value of 5, which has 5 units, hit key A1 (key10)
5. Press & release “Enter” key (A#2, Key-23)
To enter default value (36) – skip steps 3 and 4
MIDI Channel Select
Sets the pedalboard MIDI
output channel
1.
Press & release programming push
-
button
2. Press & release black C#1 (Key-2)
3. For MIDI Channel 1-8 press & release black F#2 (Key-19) and then
one of the first 8 white keys - or -
For select MIDI Channel 9-16 press & release black G#2 (Key-21) and
then one of the first 8 white keys
4. Press & release black “Enter” key (A#2, Key-23)
To enter default value (1) – skip 3
Velocity Value
Sets the key velocity (which
controls the volume)
1.
Press & release programming push
-
button
2. Press & release black D#1 (Key-4)
3. Press & release black F#2 (Key-19) and then one of the first 13 white
keys to enter ‘Tens’ of Velocity Value (digits 0-12)
example: For a value of 111, which has eleven tens, hit key G2
(Key-20, 12
th
. white key)
For a value of 5, which has zero tens, hit key C1 (Key-1, first
white key)
4. Press & release black G#2 (Key-21) and then one of first 10 white keys
to enter ‘Units’ of Velocity Value (digits 0-9)
example: For a value of 111, which has 1 unit, hit key D1
(Key-3, second white key)
For a value of 5, which has 5 units, hit key A1 (Key-10)
5. Press & release black “Enter” key (A#2, Key-23)
To enter default value (127) – skip steps 3 and 4

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Setting
Parameter
Add Analog Input to MIDI
Channel
Sets the MIDI channel on
which a given analog input
will operate. Each analog
input can operate on more
than one channel.
1.
Press & release programm
ing push
-
button
2. Press & release black F#1 (Analog Input 0, Key-7) or black G#1
(Analog Input 1, Key-9), or black A#1 (Analog Input 2, Key-11)
3. To add MIDI Channel 1-8 press & release black F#2 and then one of
the first 8 white keys - or -
To add MIDI Channel 9-16 press & release black G#2 and then one of
the first 8 white keys
4. Press & release black “Enter” key (A#2)
To enter default value (MIDI Channels Off) – skip step 3
Select Analog Input
Function
Defines the function of a
given analog input
1.
Press & re
lease programming push
-
button
2. Press & release black F#1 (Analog Input 0, Key-7), black G#1 (Analog
Input 1, Key-9), or black A#1 (Analog Input 2, Key-11)
3. Press & release black D#2 (Key-16)
4. Select desired function by pressing one the following white keys:
C1 (Key-1) Low Level calibration of an Analog Input**
D1 (Key-3) High Level calibration of an Analog Input**
E1 (Key-5) MIDI Volume Control
F1 (Key-6) MIDI Expression Control
G1 (Key-8) MIDI Tuning Control
A1 (Key-10) Ahlborn Crescendo
B1 (Key-12) MIDI Realtime SysEx Master Volume Control
C2 (Key-13) MIDI Realtime SysEx Master Coarse Tuning
D2 (Key-15) MIDI Realtime SysEx Master Fine Tuning
C3 (Key-25) Disable Analog Input
5. Press & release black “Enter” key (A#2, Key-23)
To enter default Analog Input Function (14) – skip step 4
** if Low Level > High Level, Analog Input action is inverted. The analog
control should be at the desired position before setting the function.
Cancel
Follow this procedure to
cancel just-entered data
before pressing “Enter” key
(#A2)
1.
Press and
hold
the
first white key (
C1
, Key
-
1)
2. Press & release black “Enter” key (A#2, Key-23)
3. Release first the white key (C1, Key-1)

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CLASSIC ‘AGO’ MIDI PEDALBOARD
MPD
MKSC-4A
(MIDI Keyboard Scan Computer for Matrix-wired keyboards and pedalboards)
Description
The ‘brain’ of the Classic ‘AGO’ MIDI Pedalboard is the MKSC-4A (MIDI Keyboard Scan Computer). This
circuit board translates key-switch action from keyboards and pedalboards into MIDI NOTE ‘ON’ or ‘OFF’
commands. It is a stand-alone unit that adds MIDI capability to keyboards and pedalboards. In particular, the
MKSC-4A is ideal for a new keyboard with high-quality gold or silver low-current contacts (or reed switches)
wired in an 8x8 matrix (with diodes). Matrix wiring uses only sixteen wires to simplify the connections to a
keyboard. The Classic MIDI pedalboard includes a MKSC-4A board installed.
Principal Features
•Allows a new keyboard to operate MIDI equipment.
•High-quality, low-current contacts are arranged in an 8x8 matrix array for 61-note keyboards.
•Switch de-bouncing to prevent switching errors in keyboards with older switch contacts.
•MIDI Channel set by a programming switch and pedal keys
•Non-volatile memory allows the unit to store MIDI channel and other functions when power is removed.
•MIDI input (merge function) allows other MIDI sources to simultaneously operate the same MIDI
equipment.
•An on-board push-button provides user-selectable functions such as transpose, output velocity (volume)
level, and output MIDI channel.
•If the MKSC-4A is purchased with the Classic MIDI Pedalboard, it will be shipped fully installed.
How it works
As shown on the schematic included at the end of this document (Figure 4), the PIC16F876 microprocessor forms
the heart of this system. It is a serial micro-processor containing RAM and EEPROM as well as the operating
program all in one device. It operates at a frequency of 20 MHz and has three ports. One port, JP4, is used only
for matrixed inputs from the keys. The other two ports are used for group outputs to the keys as well as input and
outputs for MIDI In and Out and miscellaneous devices.
The microprocessor scans each keyswitch separately. Keyboard wiring is minimized by wiring the keyswitches
in an 8x8 matrix. The key switches must, therefore, be wired in groups of eight. However, to avoid two or more
keys being read as being ‘On’ together through back-circuits and causing ‘phantom’ notes, each key switch
MUST have a series diode, type 1N4148 or similar. These diodes (which may be fitted either side of the switches,