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Under normal circumstances, MIDI sound modules should be connected to the switched
MIDI port labeled MIDI OUT 2. Doing so allows the organist to disable the sending of
MIDI keying data from the organ to the sound module. Devices such as MIDI
sequencers should be connected to the unswitched MIDI port labeled MIDI OUT 1,
eliminating the necessity of having to draw the MIDI stop controls before recording a
digital sequence. The drawing below illustrates the proper procedure for connecting the
Allen Ensemble™ and Allen MIDI Assistant™ to an Allen Organ.
3. MIDI Transmission Channels
MIDI information may be transmitted on several different channels simultaneously. This
allows many channels of information to be sent through one cable and used
independently from one another, similar to the way many television broadcasts can be
sent through one cable. In order to receive the intended information, a MIDI device must
be tuned to the same channel as the device that is sending the information.
Your Allen Organ transmits MIDI information on several channels. When external MIDI
devices are connected to the organ, it is important to make sure that the devices’ channels
of transmission and reception match the MIDI channels of the Allen Organ divisions to
which they are assigned.
MIDI Program Change Messages are transmitted from the organ’s General Pistons on
MIDI Channel 8. These program change messages can be used to change the settings of
MIDI sound modules or synthesizers that are connected to the organ. Please consult the
owner’s manual of your MIDI device(s) for more information on how MIDI Program
Change Messages are handled by that particular device.
In addition to keying and divisional registration information, MIDI Volume Messages are
sent on the individual MIDI channels for each division of the organ. These volume
messages are controlled by the expression shoe. In this manner, the volume of connected
MIDI devices may be controlled.
Please consult the owner’s manual of your MIDI device(s) for more information on how
MIDI Volume information is handled by that device. If any external MIDI device is used
to transmit information to the Allen organ, the same assignment of MIDI channels must
be used as described elsewhere in this manual.
ALLEN ORGAN
MIDI
OUT 1
MIDI
OUT 2
MIDI
IN
ALLEN ENSEMBLE II
MIDI
THRU
MIDI
IN
MIDI ASSISTANT
MIDI
OUT
MIDI
IN
