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 multiple 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.
30
ORGAN
MIDI OUT1 (Seq)
MIDI OUT2
MIDI IN
MIDI ASSISTANT
MIDI IN
MIDI OUT
ENSEMBLE
MIDI IN
