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7. MIDI -
The letters MIDI stand for the Musical Instrument Digital Interface, an international standard for connecting
synthesizers, drum machines, and other electric/electronic musical instruments so that they can exchange
keyboard and program data. Through this interface, the organist can play a variety of instruments from a
single instrument. (The extract types of data that may be exchanged and the functions that may be controlled
vary with the instruments connected through this interface.)
7.1
Introduction
Ш Connectors
SR2 with the MIDI interface feature the following
receptacles which accept the DIN plugs on MIDI
cables.
IN — Accepts the incoming
keyboard,
program,
and other types of data.
;
OUT — Transmits keyboard, program, and other
types of data.
Ш Connections
The
MIDI
interface
allows
electric/electronic
musical instruments to exchange keyboard, pro-
gram, and other types of data. The instruments
can be connected so that the data flows only one
way — with only one instrument transmitting and
the other(s) —
or so that data flows both ways.
The
organist
specifies
the
data
pathways
by
connecting the MIDI OUT terminal of the trans-
mitting instrument to the MIDI IN terminal of the
receiving one.
OUT
IN
Transmitting
Receiving
instrument
instrument
18
Ш Channels
Since
the
MIDI
interface
can
connect
several
instruments at once, the organist needs a way to
specify which instrument is to play. This is done
by assigning channel numbers, numbers between
1 and 16, to the instruments.
И Features
The MIDI interface on the SR Series of organs
transmits the following types of data.
(a) Keyboard data
By connecting the organ to a synthesizer, the
organist can play the organ from the synthe-
sizer keyboard and vice versa.
Channel specifications
The organ always assigns the following MIDI
channels to the keyboard.
Ch. 1. UPPER
Ch. 2. LOWER
Ch. 3. PEDAL
The registration memory section can transmit
and receive on MIDI channel 1.
Program change
The organist can send a command
from the
organ to a synthesizer to change the program
number. (For the procedure, see p. 19.)
(b
—
—
(c
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