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MIDI, the Musical Instrument Digital Interface, is a world-
standard communication interface that allows MIDI-compat-
ible musical instruments and equipment to share musical infor-
mation and control one another. This makes it possible to cre-
ate "systems" of MIDI instruments and equipment that offer
far greater versatility and control than is available with iso-
lated instruments.
The PSR-500M MIDI Connectors
The PSR-500M MIDI IN connector receives MIDI data
from an external MIDI device which can be used to control the
PSR-500M. The MIDI OUT connector transmits MIDI data
generated by the PSR-500M (e.g. note and velocity data pro-
duced by playing the keyboard).
Simple MIDI Control
Most MIDI keyboards (including the PSR-500M, of course)
transmit note and velocity (touch response) information via the
MIDI OUT connector whenever a note is played on the key-
board. If the MIDI OUT connector is connected to the MIDI
IN connector of a second keyboard (synthesizer, etc.) or a tone
generator (essentially a synthesizer with no keyboard), the
second keyboard or tone generator will respond precisely to
notes played on the original transmitting keyboard. The result
is that you can effectively play two instruments at once, pro-
viding thick multi-instrument sounds. The PSR-500M also
transmits "program change" data when one of its voices is
selected. Depending on how the receiving device is set up, the
corresponding voice will be automatically selected on the
receiving keyboard or tone generator whenever a voice is se-
lected on the PSR-500M.
MIDI keyboard
-
or
PSR-500M
MIDI
MIDI
tone generator
ол
IN
36
APPENDIX A: MIDI BASICS
The PSR-500M is capable of receiving the same MIDI data,
so a second MIDI keyboard connected to the PSR-500M MIDI
IN connector can be used to remotely play the PSR-500M and
select voices as required.
MIDI Keyboard
PSR-500M
MIDI
мр!
OUT
IN
MIDI Sequence Recording
The same type of musical information transfer described
above is used for MIDI sequence recording. A MIDI sequence
recorder can be used to "record" MIDI data received from a
PSR-500M, for example. When the recorded data is play
back, the PSR-500M automatically "plays" the recorded ,
formance in precise detail.
PLAYBACK
PSR-500M
MIDI sequencer
Note: Never use MIDI cables longer than about 15 meters, since
cables longer than this can pick up noise which can cause data
errors.
MIDI Bulk Dump
MIDI bulk dump operations allow large amounts of MIDI
data to be transmitted from one device to another. The ег
contents of the PSR-500M PAGE MEMORY, for examp
can be dumped to a second PSR-500M or to a bulk storage
device such as a MIDI data recorder or MIDI computer.
PSR-500M
MIDI data recorder
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