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NORD MODULAR G2 V1.4x 12. midi implementation: What is MIDI?
Page 141
12. MIDI IMPLEMENTATION
WHAT IS MIDI?
MIDI
is an acronym for Musical Instrument Digital Interface, which is a music industry wide standard to
connect electronic musical instruments. By using
MIDI
one instrument can play another instrument, no
matter the brand or model for the two instruments.
MIDI
is a combination of a hardware connection and
a set of software commands sent over the hardware connection. In essence
MIDI
is a one way connection,
but most instruments have two or three connectors, a
MIDI
IN
, a
MIDI
OUT
and optionally a
MIDI
THRU
connector. If one instrument needs to play another instrument the
MIDI
OUT
connector of the first
instrument must be connected to the
MIDI
IN
connector of the instrument to be played by the first
instrument. If an instrument has both a
MIDI
IN
and a
MIDI
OUT
connector it can in essence play another
instrument and be played from the other instrument. The
MIDI
THRU
connector is used to chain more
than two instruments and simply passes on what comes in on the
MIDI
IN
connector.
There are eight groups of software commands that can be sent over
MIDI
. These command groups are:
NoteOff used to silence a playing note
NoteOn used to play a note
Poly Key Pressure used to apply key pressure of individual keys (very rarely implemented)
Control Change used to signal changes in a panelknob or play controller like a modwheel
Program Change used to change to another sound or patch
Channel Pressure used to apply global key pressure (like on the G2)
Pitchwheel Change used to apply changes in the Pitchstick position
System Commands used to send global or instrument specific information
MIDI
MODULES
The G2 system offers
MIDI
modules to send and receive NoteOn/NoteOff commands, Control Change
(or
MIDI
CC
#) commands and Program Change commands. The data that will be embedded in these
commands can come from signals generated by other modules, like LFO modules, sequencer modules,
etc. By using
MIDI
OUT
modules in a patch other
MIDI
instruments can be controlled, sequenced and
modulated directly with signals generated within the Patch. Of course it is up to you to send commands
and data that will make the other instrument do sensible things.
S
YSTEM
C
OMMANDS
In the System Commands group are the global information commands that keep timing by sending
MIDI
CLOCK
,
MIDI
START
and
MIDI
STOP
commands. When the G2 is set to sending
MIDI
CLOCK
these
commands are used by the Master Clock control and the Run/Stop button on the G2 frontpanel.
Note that the G2 frontpanel Run/Stop button can be emulated on the G2 Engine by sending
MIDI
CC
#80 to the G2 on the Global
MIDI
channel. Use a value of 0 or 127 to stop or start the
MIDI
CLOCK
. After
reception of
MIDI
CC
#80 on the Global
MIDI
channel,
MIDI
START
or
MIDI
STOP
commands will be
relayed to the
MIDI
OUT
connector on the back of the G2. See also “MIDI Global Channel” on page 142.
S
YSTEM
E
XCLUSIVE
COMMANDS
A special subgroup in the System Command group are the System Exclusive or S
YS
E
X
commands. In a
S
YS
E
X
command instrument specific information can be embedded. An example of a S
YS
E
X
command
is a patch dump or performance dump, where a complete patch or performance is embedded in the
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Productinformatie
| Merk | Nord |
| Model | Modular G2 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 60689 MB |
