User manual

MIDI KEYBOARD CMK-2 HARDWARE CONFIGURATION MANUAL v1.5
CMK-2 Manual 1.5.doc 2009 CLASSIC ORGAN WORKS 21
CLASSIC MIDI KEYBOARD
CMK-2-1
5. HARDWARE CONFIGURATION
Introduction
The CMK-2 is customizable to suit many organ applications. Up to four CMK-2 keyboards may be stacked level, or
tilted if the optional mounting brackets are purchased. Each keyboard has 61-keys that serve for programming as well
as musical purposes. Three useable analog inputs are available (for volume/expression and crescendo adjustment).
Note: While you can set the keyboard functions in this way, pistons must be set up using the Configuration software.
See 6. Software Configuration.
Power-On Self Test
The CMK-2 has a built-in self-test that executes upon power up.
Analog Input Pins
There are three analog inputs on the CMK-2, each with three-pin terminal blocks. Keyboard Analog devices must be
connected to the analog input pin ‘2’, a positive voltage (+5V) on pin ‘1’, and ground potential (0V) on pin ‘3’.
Depending on the position of the analog device, a voltage will be read by the processor that will determine the setting.
In the case of a volume control, the position of the analog device will determine the loudness level. See Figure 9.
MIDI Crescendo – for Ahlborn Archive modules
MIDI messages are sent to add stops progressively to a registration. ‘Analog Input 3’ is used for Crescendo.
MIDI Volume
A MIDI controller-7 message is sent to change the loudness level of the stop or sound (typically for Ahlborn Archive
modules). The MIDI volume analog input must be configured to transmit on one or more MIDI channels as outlined in
Table 9.
MIDI Expression
A MIDI controller-11 message is sent to set the loudness level within the preset volume range (typically for
Hauptwerk). ‘Analog Input 1’ is used for Expression but can also be used for Volume. Expression messages adjust the
loudness within a range not exceeding the maximum set by volume. The MIDI Expression analog input must be
configured to transmit on one or more MIDI channels as outlined in Table 8. In multi-manual CMK-2 setups, the range
for the Expression control can be set by attaching a Volume control to one of the keyboards and attaching an
Expression control to another keyboard. If the volume and expression controls are set to produce messages on the same
MIDI channels, the volume control will set the maximum range while the expression control will change the loudness
level in the volume range.