Musical Instrument Digital Interface (Midi) - Korg POLY-800 Owner's Manual

6. MUSICAL INSTRUMENT DIGITAL
INTERFACE (MIDI'
The Musical Instrument Digital Interface is a "universal
language" which allows different types of musical equipment
to talk to each other. I( is the result ot an agreement between
many musical instrument manufacturers. It provides a uniform
kinds of equipment for performance, studio use and other
purposes.
MIDI-compatible equipment can include synthesizers. Se-
,
The optional 5 pin DIN style MlDf connecti?g cable should
be used for connecting the Poly-900 to another MIDI-corn-
The Poly-800 can transmit and receive the f&lowing kinds of
data over the MIDI bus.
1. Key Data (pith of notes and when they begin & end)
from the Keyboard
l
. from the Sequencer
2. Joystick data
3. Sequencer clock and START/STOP control signals
4. Program changes
NOTE:
of
these functions, if will only be offerfed by /he func!ions
Several MIDI functions are set up as Poly-900 parameters.
and can be changed by you. These include:
Selecting whether the Poly-800 will receive information
from ALL MIDI channels (called the "OMNI On" mode),
selecting the Receive Channel ( 85 r. There can be up
to 16 possible data Channels (sort of like tracks on a multi
track recorder) on a single MIDI bus line.
be hooked up on the same MIDI bus (when connected
to an appropriate external sequencer or computer). Each
"track" or Channel can carry a different set of chords,
melodies, bass lines. ate.
Program Change commands. (s 7)
selecting whether the Poly-800 Sequencer is controlled by
signals received over the MIDI bus.
PLEASE REFER TO SECTION 3.4.9 ON MIDI PARAMETERS

MUSICAL INSTRUMENT DIGITAL INTERFACE (MIDI)

CONNECTIONS
SAMPLE
U
When two Poly-900s are connected together as in the above
diagram, notes played on Synth A are duplicated by Synlh
[parameter 87 = 11). sequencer data, joystick data and "mode
messages" can also be sent from A to 8.
Synth A (the transmitting keyboard) always transmits key.
board note data on channel "1". and sequencer note data
on channel '2". regardless of the sening of its Receive Chan-
nel Parameter (parameter "86"). Thus. Synth B may receive
pending on Synth B's mode and Receive Channel settings.
When the synrhs are lirst turned on, B will initially receive
data on ALL MIDI channels (called the "OMNI On" mode].
If the sequencer on Synth A is started (and Synth B is sat
to Receive Channels 1 or Z), then a message is sent Synth
the '"Multi-channel" or "OMNI Off" mode). The receive chan-
nel last selected by the user will be retained, even when power
is turned off; therefore. the user may have to select a differ-
ent channel. depending on the function desired (see below).
The following summarizes the different MIDI operations of
two Poly-800s connected together:
1. When Synth B is first turned on:
Synth B will receive BOTH Keyboard and Sequencer
NOTE data (plus Program Change & Joyslick dala) from
Synth A.
2. Select Receive Channel 1 on Synth B:
Synth B will receive Synth A's Keyboard, Program
Change 8 Joystick data only.
3. Select Receive Channel 2 on Synth 8:
Synth B will receive Synrh A's Sequencer Note data
(NOT Sequencer starilstopl~iming data) only.
. .
T H E