Doepfer MKE User Manual

MKE

Universal Midi Keyboard Electronics

User's Guide

© 2006 by

Doepfer Musikelektronik GmbH

Geigerstr. 13
82166 Graefelfing
Germany
Phone: #[phone]
Fax: #[phone]
Web Site: www.doepfer.de
Email: [e-mail]

Electrical safety / EMC compatibility

is a so-called

MKE

used independently but has to be combined with additional electrical or electronical
equipment to become a working device (suitable keyboard, pitch bend and modulation
wheel, rotary or fader potentiometer, power supply, case/housing). The manufacturer of MKE
does not know the final assembly of the complete device in which the MKE is used as a part
of the complete device. The final responsibility with regard to

electromagnetic compatibility

Please pay attention to the following items:

The

power supply

power supply with VDE approval is required). Normally an AC adapter with plastic case is
used. It is not allowed to use
via mains lead, pcb tracks, electronic parts).

On the MKE electronics
(e.g. RF filters at the power supply input and the MIDI lines). But it is impossible to estimate
to what extend the
complete assembly. Therefore the

electromagnetic radiation

closed metal case that covers the complete assembly. The metal case should be connected
to GND of the MKE.

OEM product

used in combination with the MKE has to be a closed type (in Germany a

preventing measures

components added by the user

(incoming and outgoing). These demands are normally met by a

(OEM original equipment manufacturer) that cannot be

electrical safety

is up to the user who is assembling the complete device.

open power supplies

complete device

with open

against

affect the
has to be

mains voltage

electromagnetic radiation

EMC properties
shielded

and

access (e.g.

of the

against

are met

Warranty

• All connections have to be carried out in the off-state of the MKE (i.e. without power
supply)

• The MKE is an electrostatic sensitive device. Avoid any electrostatic charges !

• Do not solder directly to any of the pin headers but use female connectors to make the

connections between the MKE and your application. We offer suitable cables.

• If external momentary switches or LEDs are connected to the MKE they have to be
soldered in the off state of the MKE (i.e. without power supply)

• Applying a negative voltage or a positive voltage beyond +5V at the ADC inputs (ST3,
ST4, ST5, ST6) will destroy the circuit.

• Avoid short cuts while MKE is powered !

• Ignoring any of these items will cause warranty loss !

• Return of the MKE within the 2 weeks return time limit (valid only in Germany) is only

possible if all these items have been met. MKE that have been soldered by the customer
cannot be taken back (e.g. if external momentary switches or LEDs have been soldered to
the MKE by the user).

MKE page 2 User's guide V2

Contents

Electrical safety / EMC compatibility ........................................................................................2

Warranty...................................................................................................................................2

Contents ...................................................................................................................................3

Introduction...............................................................................................................................4

Connections (pcb bottom side).................................................................................................6

(1) Power Supply ..................................................................................................................6

(2) Midi-Out...........................................................................................................................6

(3) Midi-In..............................................................................................................................6

(4) Keyboard connectors ......................................................................................................9

(5, 6, 7, 8) Connectors for pitch bend, modulation, volumen and sustain / after touch.........9

(9) Jumper for pull up/down resistor ST8............................................................................11

(10) sound card connector..................................................................................................11

Controls (pcb top side) ...........................................................................................................12

Display (9)...........................................................................................................................12

LEDs (10)............................................................................................................................12

Buttons (11) ........................................................................................................................12

1. Midi channel ................................................................................................................13

2. Transpose ...................................................................................................................13

3. Program Change.........................................................................................................13

4. Function of ST6...........................................................................................................13

5. Up / 6. Down ...............................................................................................................13

Parameter Storage .................................................................................................................14

Non-dynamic Operation .........................................................................................................14

Check list................................................................................................................................15

User's guide V2 page 3 MKE

Introduction

MKE is an

•

combination with these devices:

standard keyboard (manufacturer: Fatar/Italy) with 2, 3, 4 or 5 octaves

•

(connected to the female headers ST1 and/or ST2)

pitch bend wheel (special spring-loaded rotary potentiometer), connected to

•

the pin header ST3

modulation wheel (special rotary potentiometer), connected to the pin header

•

ST4

rotary or fader potentiometer for volume (Midi controller #7), connected to the

•

pin header ST4

after touch sensor or sustain, foot switch (factory setting: sustain = Midi

•

controller #64), connected to the pin header ST6

with a small circuit modification even a second rotary or fader potentiometer

•

can be connected to ST6 to generate any Midi controller (free adjustable Midi
control change number)

The MKE has this controls available

•

6 buttons for the functions

•

Midi channel

•

transpose

•

program change

•

function of ST6 (assignment of any Midi control change number or after

•

up

•

down

•

6 light emitting diodes (LEDs), assigned to the buttons

•

3 digit LED display

•

universal Midi keyboard electronics

touch)

, that can be used in

MKE is equipped with

merged

together or combined with other OEM products (e.g. Pocket Electronics, Dial
Electronics, CTM64, MTC64) to built a user specific Midi controller. E.g. two MKE
and one CTM64 can be used to built an organ keyboard with 2 velocity sensitive
manuals (2 x MKE) and a non-dynamic bass pedal (CTM64).

MKE is available only as an
measures are about 68 x 85 x 45 mm. Four mounting holes with 3 mm diameter are
available for mounting the pc board to a suitable base e.g. with distance sleeves or
spacers and screws.

to the data generated by the MKE. In this way

Midi In

and

Midi Out

assembled and tested pc board

. The incoming Midi messages are

several MKE can be linked

. The pc board

MKE page 4 User's guide V2

If you order MKE in combination with one of the keyboards we have available (Fatar
TP7/2 octaves or TP/9 with 3, 4 or 5 octaves or organ keyboard TP/8O with 5
octaves) please do not forget to order the cable sets that are required to connect
MKE to the keyboard.

If MKE is ordered without keyboard please specify the

length of the keyboard

as

the connectors are different for 2, 3, 4 and 5 octaves.

We have suitable keyboards (2, 3, 4 or 5 octaves), keyboard connection cable sets,
pitch bend or modulation wheel kits, cable sets for ST3...6, sustain pedals and so on
available. Please look at our web price list (section spare parts resp. accessories) for
details and prices. These parts are not included with the MKE and have to be ordered
separately.

We do not offer a suitable housing as the MKE can be combined with different types
of keyboards and other OEM products (e.g. Pocket Electronics, Dial Electronics,
CTM64, MTC64) to obtain a user-specific Midi controller.

An

external power supply

(7-12VDC@min. 250mA) is required. It is included with
the MKE only within Germany. In other countries the external power supply has to be
ordered additionally by the local dealer if necessary.

Installation of the MKE requires some electronical knowledge (especially if wheels,
potentiometers, the after touch sensor or a sustain foot switch have to be connected
to the MKE). Please leave the installation of MKE to an expert if you are not familiar
with electronics. We take back only MKE modules in the original state, i.e. without
solder residues, without scratches and so on.

Please pay attention to the following remarks and to the warranty notes on page 2.
Ignoring these notes causes warranty loss and the right to return the goods

.

User's guide V2 page 5 MKE

Connections (pcb bottom side)

Please refer to the picture on the next page.

(1) Power Supply

The MKE does not have a built-in power supply. Instead it uses a plug-in type
external power supply (AC adapter). One reason for this feature is electrical safety.
Keeping danger voltages (main) out of the MKE increases the electrical safety.
Therefore an external power supply of high quality and safety should be used. If the
keyboard is used in Germany the external power supply has to be VDE approved.
Another reason for the external power supply is the fact that line voltages and plug
types vary considerably from country to country. Using a plug-in external supply the
MKE can be used anywhere with a locally purchased power supply, thus keeping the
retail price down.

The power supply must be able to deliver 7-12 VDC unstabilized voltage, as well as a
minimum current of 250mA. The MKE is switched ON by plugging the AC adapter
into a wall outlet and connecting it to the appropriate jack on the MKE board. There is
no separate ON/OFF switch. If the polarity of the power supply is incorrect, the MKE
will not function. However, there is no danger of damage to the circuitry since it is
protected by a diode. The correct polarity is: outside ring = GND, inside lead =
+7...12V. The power supply not included with the MKE and has to be purchased
separately.

After power on the six LEDs light up for a short moment and the software version
(e.g. 1.0) is displayed.

(2) Midi-Out

Connect the Midi Out jack with Midi In of the device to be controlled by the MKE (e.g. sound
expander, computer, sequencer, synthesizer, or a second MKE or another OEM product like
Pocket Electronics, Dial Electronics, CTM64) via a suitable Midi cable.

(3) Midi-In

The MKE features a Midi input. This input may be connected to another Midi device.
The incoming Midi data are merged to the data generated by the MKE. At the first
place the Midi input is used for daisy-chaining several MKE or other OEM products
like Pocket Electronics, Dial Electronics or CTM64. The Midi input of MKE is not
suitable for large amounts of Midi (e.g. SysEx strings or Midi messages coming from
an computer sequencer). In case of large amounts of incoming Midi messages data
loss or delay may occur. If the merge feature of the MKE is not required the Midi
input is left open.

MKE page 6 User's guide V2