User manual

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CMK-1 Manual (Issue-1)
Page-11 October 20, 2004
CLASSIC MIDI KEYBOARD
CMK-1
INTRODUCTION
Description
Congratulations! You are now the proud owner of the CMK (Classic MIDI Keyboard). The CMK combines
technology and classical church organ ideas into an innovative MIDI device. With the CMK, MIDI sound modules
may be controlled as if they were part of the organ. Designed as a portable unit, it features a ‘stackable’ feature so that
users may customize a complete practice organ to their specification. With a quality construction, various structural
and electronic design elements, and user-friendly configuration software, the CMK will provide many years of worry-
free musical enjoyment for all users.
The CMK is designed for organists, organ enthusiasts, and MIDI users. Key-switch information from the keyboard
and pistons is converted into MIDI control data by the on-board micro-controller. For instance, a MIDI message
defines whether a key was pressed or released, the MIDI channel that the information should be transmitted on and the
key number pressed or released. As many as three CMK keyboards may be daisy-chained.
Each CMK keyboard also has 20 pistons to control features such as coupling and effects. The CMK can
simultaneously drive up to four Ahlborn Archive Series™ modules that generate pipe-organ voices. In addition, any
MIDI-controlled sound module or PC-based synthesizer software may be connected. These pistons are also used for
programming the CMK. Combinations of pistons and keyswitches are used for functions such as a reboot, setting the
MIDI output channel, turning on and off velocity sensing, and setting the volume output.
There are two analog inputs which can be configured as volume/expression and crescendo inputs. By adjusting the
analog device, a unique voltage reading is produced on the analog input pin which is interpreted by the
microprocessor. In the case of a volume adjustment, a MIDI message will send to the MIDI-controlled device the
loudness level of the stop or sound. MIDI messages are also sent for a crescendo adjustment which will gradually add
stops to a registration.
The CMK is completely customizable using the included ‘CMKConfig’ software. Up to 128 configurations may be
programmed into the CMK. As many as three keyboards each with twenty pistons and two analog inputs may be
configured for Ahlborn Archive
modules, General MIDI sound modules, and MIDI-controlled PC-based synthesizer
software. The software is capable of customizing the CMK for use with organ computer simulation software such as
Hauptwerk and the Sound Canvas Pipe Organ Project (SCPOP).
Configurations are saved as computer files which may be stored in the user’s home computer, or in the CMK.
Configurations that are saved on the CMK will not be lost when power is turned off because the memory is non-
volatile. These configurations may be selected using DIP-switches on the CMK. Eventually, users may inexpensively
upgrade their software as well as configurations by visiting the Classic Organ Works website at
http://www.organworks.com
.