MIDI channels are
in
some ways similar to the channels
on a television set.
On a T.V., a vanety
OT
programs
broadcast
from
different stations can be
viewed
by
switching
channels.
This is because the information on
any particular
channel
is conveyed only when
the
re-
ceiver
is
set
to
the
same
channellhal
is
being
used
for
transmission.
On a
T.V
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The channels
available
with MIDI range
lrom
1 to 16.
When a
musical
instrument (the receiver)
is
set so its
channel
matches
the
MID! channel
usedby
the transmit-
ling device, the
MIDI
data
is
conveyed.
OMNI
Mode
When
setto
OMNI
On, MIDI data on any channel
canbe
received,
regardless
of the setting made
for
the receive
channel.
It
should be
set
to
OMNI
Off il you wish to receive MIDI
data on the
receive
channel
lhat
is
set.
2.
MIDI
Messages
Recognized
by
the
GP·
16
In
order
to
convey
the great variety
of
expression
pos~
sible with
music,
MIDI
has been provided with a large
range
of
data
types
(messages).
Program
Change
Messages
These
messages
are
used
mainly
lor
making
changes
to
another sound.
Sounds
are changed uSing
Program
Change
Numbers,
from
1
to
128. Patch changes
on
the
GP·16
correspond
with
Program Change
Numbers
as
follows;
Patch
Number
A-1-1
10
B-8-8
46
I Program Change
Number
I
, 1
10
128 I
Control
Change
Messages
Control Changes
messages
are used to enhance the ex·
preSSIvity
of
a performance. Each function
is
identified
by a Control
Change
Number, and the functions avail-
able
for control will vary depending on the instrument.
On
the GP·16, functions equivalent to "EXP(1)", "EXP2",
and "Control Pedal",
for
a foot controller connected
to
the
GP-16 can be controlled
lrom
another device.
Exclusive
Messages
Exclusive Messages handle information such as that
re-
lated to a device's unIque tones. Generally, such
mes~
sages can be exchanged only between devices
of
the
same model and by the same manufacturer. Exclusive
Messages can be employed instead
of
Program Change
Numbers
to
save Patch
se"ings
to a sequencer, or used
lor
transferrrng Patch settings
to
another GP-16.
Whenever
Exclusive Messages are to be used
lor
com-
munication, both musical instruments need to be set to
the same Unit Number.
On the
GP·16
fhe Unit Number
corresponds to
Ihe MIDI Channel's number.
If
a sequencer capable of handling Exclusive Messages
is
used, instead of Program Change Numbers, temporary
data can be transmitted. and lone changes can be made.
MlDllmplementalion
Chart
MID! has made
rt
possible jor a wide range of musical
instruments to communicate with each other, but thai
doesn't mean thai the
many
types
01
data will all
be
understood. The only communication possible
is
con-
cerned with the data that both Instruments understand.
It
is
lor
this reason that every owner's manual,
lor
all
kinds
of
musical instruments, always inCludes a MIDI
Implementation Chart.
as a quick reference to the types
01
MIDI messages
I!
IS
capable
01
handling. You can
compare the
MIDI Implementation Charts
tor
both instru·
ments in orderto find out which types
of
dalacan
be com-
municated between them
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