Yamaha PSR-9000 Owner's Manual page 145

Channel Messages
The PSR-9000 is an electronic instrument that can handle 32 channels. This is usually
expressed as "it can play 32 instruments at the same time." Channel messages transmit infor-
mation such as Note ON/OFF, Program Change, for each of the 32 channels.
Message Name PSR-9000 Operation/Panel Setting
Note ON/OFF Messages which are generated when the keyboard is played. Each mes-
sage includes a specific note number which corresponds to the key which
is pressed, plus a velocity value based on how hard the key is played.
Program Change Voice selecting (control change bank select MSB/LSB setting)
Control Change Volume, panpot (Mixing Console), etc.
System Messages
This is data that is used in common by the entire MIDI system. System messages include
messages like System Exclusive Messages that transmit data unique to each instrument
manufacturer and Realtime Messages that control the MIDI device.
Message Name PSR-9000 Operation/Panel Setting
System Exclusive Effect type settings (Mixing Console), etc.
Message
Realtime Messages Clock setting, Start/stop operation
The messages transmitted/received by the PSR-9000 are shown in the MIDI Data For-
mat and MIDI Implementation Chart on pages 192 and 208.
MIDI and TO HOST Terminals
In order to exchange MIDI data between multiple devices, each device must be con-
nected by a cable.
There are two ways to connect: from the MIDI terminals of the PSR-9000 to the MIDI
terminals of an external device using a MIDI cable, or from the TO HOST port of the
PSR-9000 to the serial port of a personal computer using a special cable.
If you connect from the PSR-9000 TO HOST terminal to a personal computer, the
PSR-9000 will be used as a MIDI interface, meaning that a dedicated MIDI interface
is not necessary.
In the rear panel of the PSR-9000, there are two kinds of terminals, the MIDI terminals
and the TO HOST terminal.
MIDI A
IN
MIDI IN Receives MIDI data from another MIDI device.
MIDI OUT Transmits the PSR-9000's keyboard information as MIDI data to another
MIDI device.
TO HOST Transmits and receives MIDI data to and from a personal computer.
The MIDI A terminals and the TO HOST terminal are mutually exclusive; they cannot
be used at the same time. Use the HOST SELECT switch to change between the MIDI
A terminals and the TO HOST terminal.
When the HOST SELECT switch is set to "MIDI," the MIDI A terminals receive/trans-
mit MIDI data. When the HOST SELECT switch is set to "Mac," "PC-1," or "PC-2,"
the MIDI A terminals will not receive/transmit data.
The MIDI B IN/OUT terminals function regardless of the setting of the HOST
SELECT switch.
MIDI B
OUT IN OUT
HOST SELECT TO HOST
PC-2 PC-1
MIDI Mac
MIDI A
MIDI Functions
• The performance data of all
songs, styles and Multi Pads is
MIDI data.
• When using the TO HOST ter-
minal to connect to a personal
computer using Windows 95/
98, a Yamaha MIDI driver must
be installed in the personal
computer. The included disk
contains the Yamaha MIDI
driver.
• Special MIDI cables (sold sep-
arately) must be used for con-
necting to MIDI devices. They
can be bought at music stores,
etc.
• Never use MIDI cables longer
than about 15 meters. Cables
longer than this can pick up
noise which can cause data
errors.
• The MIDI B port ignores Sys-
tem Exclusive messages.
145
Reference