User manual

MIDI KEYBOARD CMK-2 MIDI SPECIFICATION MANUAL v1.5
CMK-2 Manual 1.5.doc 2009 CLASSIC ORGAN WORKS 17
CLASSIC MIDI KEYBOARD
CMK-2-1
4. MIDI SPECIFICATION
MIDI (Music Instrument Digital Interface) is a communication system between computer-controlled music
instruments and describes all the actions of a musical performance. It was originally developed for music synthesizers
but, a few years ago, organ-builders began adding MIDI capabilities to pipe organs. However, as MIDI was not
designed for a complex musical instrument such as the organ, its standards are subject to organ-builders preferences.
MIDI is composed of three components which are the language (protocol), hardware (MIDI connector), and
distribution format (MIDI file)
[1]
. The MIDI language is in binary format and is a uni-directional asynchronous stream
of bits at 31.25 KBits per second with 10 bits transmitted per byte. The 10 bits per byte consist of a start bit, 8 data
bits, and a stop bit. In the hardware domain, the MIDI 1.0 Specification (maintained by the MIDI Manufacturers
Association) recommends the 5-pin DIN 180° connector. The 5-pin DIN connector is standard and allows MIDI
equipment from differing manufacturers to be connected together. MIDI cables transmit information in a uni-
directional manner so connectors are designated as either input or output. MIDI files are the standard distribution
format. They capture all the details of MIDI onto a hardcopy medium. MIDI files are similar to the MIDI language
except that they add a time-stamp for each event so that MIDI equipment can replicate the timing required to generate
accurate performances. MIDI Message information can be found at www.midi.org
.
The standard MIDI sounds available with General MIDI are listed in Appendix-F.
Ahlborn
[2]
:
The Ahlborn Archive modules allow additional pipe organ sounds to be played on an existing organ. There are four
separate Ahlborn Archive modules of 20 different stops each over three separate divisions. For more information on
Ahlborn Archive modules, please visit: http://www.ahlbornorgans.com/archive
. The messages for controlling Ahlborn
Archive modules can be found in Appendix D. The stop list for each module is shown below.
Table 3: Classic Module
[3]
Division A Division B Pedal
Description Description Description
Gemshorn 8' Principal 8' Contre Basse 32'
Gemshorn Celeste 8' Holzgedackt 8' Contre Gambe 16'
Flûte à cheminée 8' Flûte Harmonique 8' Contre Bombarde 32'
Koppelflöte 4' Flûte Octaviante 4' Bombarde 16'
Plein Jeu IV-V Octave 2' Div. A to Ped.
Bombarde 16' Cymbale III Div. B to Ped.
Harmonic Trumpet 8' Tremulant
Corno di Bassetto 8' Div. A to Div. B
Festival Trumpet 8'
Clarion 4'
Tremulant
Div. B to Div. A