3.
Transmission/Reception
of
data
using
MIDI
(Data
transfer)
By
employing Roland MIDI System Exclusive
meso
sages, the GP·16's patch data can be transierred
to
another GP·16 or
to
another device such
as
a MIDI
sequencer, where
rt
can be stored.
For information
on
liansmission, see
"5
Transmission
oj
data~
(~
PAB).
For inlormation on recepuon, seE
"6,
Data receplion and
verifica1ion~
(IS· P.5D).
4.
Mapping
the
correspondence
between
patches
and
Program
Change
Numbers
(Map
edit)
Settings can
be
made which determine the correspon·
dence belween Program Change Numbers and Patches
that will penain when the GP·16's Palches
are
changed
using an exlernal
MIDI device. Conversely, setlings
can
also
be
made
to
determine
the
correspondence
between
Patches and Program Change Numbers which will
be
used
to
select among Presets on an external MIDI
device,
uSing
the
GP'16
For details. refer
to
"7.
MIDI
Mapping (Program
Change-
PatCh)"
(19"
P.52)
and "8. MIDI Mapping
(PatCh
- Program
Changer
(S'
P.52).
~
Concerning
MIDI
WHA T IS MIDI?
MIDI stands for the "Musical Inslnumenf Digital Inler·
face".
It
is
an
iniernational standard that allows for a
variety of data
10
be exchanged between differenf Inslnu·
menls. Such data includes information such
as
that ot
Ihe music penormed, and about changes
In
sound.
As
long Ihey are MIDI compatible, all devices, regardless
of
differences m model or manufaclurer,
can
exchange
whaleverpertormance data they are equipped
to
under·
stand.
With
MIDI, a pertormance on a keyboard,
or
operations
involving controls, are handled
as
MIDI data.
When
an
instnument
IS
played, a stream
of
MIDI
meso
sages
is
generated that corresponds
10
the events
happening
dUring play. A MIDI device receiving these
messages can then produce sound
as
n
it
were being
played
directly.
1.
The
Exchange
of
MIDI
Data
The exchange of MIDI data is carried oul
as
explained
in
Ihe following.
About
MIDI
Connectors
In
carrymg out fhe exchange
of
MIDI data.lhe 3 types
01
connectors
shown
below
are
used.
MIDI
cables
are
connected
to
these
connectors
in
various
ways
depend-
ing on the method they are to be used.
MIDI
IN
: Receives data trom another MIDI device.
MIDI OUT : Transmits data originaling
in
the unil.
MIDI THRU: Sends out an exact ccpy
of
the
data received
at
MIDI
IN.
In
theory, any number
of
MIDI devices
could
be
connected
together
using
MIDI THRU connectors,
bUl
h
is
best
to
consider
4.
to
5 devices
as
being
the
practical
iimit,
This
is
because
the
further
down
the
line
a device
is
located,
the
more
deJaythere
is
that
could
occur,
and
the
chance
oj
error
due
to
deterioration
in
Signal
quality increases.
MIDI
Channels
Wilh MIDI, a single cable can be used
lor
carrying
differing
sets
of
periormance
inlormation,
for
a
number
of
MIDI devices. This
is
possible thanks
to
the
concept
of
a MIDI channel.
45
4
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