Description On Midi; System Exclusive Message - Yamaha FB-01 Service Manual

■ DESCRIPTION ON MIDI
The MIDI signals which the FB-01 can use are classified as
follows.
Channel Message
• Channel voice message
This is a signal to transmit and receive the information which
is directly, related to playing. However, for the FB-01, this
type of message can only be received, but it can not be
transmitted.
The main messages are as follows.
Key note number
Key ON/OFF signal
Key velocity
Change of voice number
Pitch bender
Various control information
• Channel mode message
This message is a signal to indicate the mode which will dic¬
tate the processing of the transmitted MIDI data. One ex¬
ample of this type of message is a polyphonic/monophonic
switching message.
System Message
• System common message
This message executes the total system setup and performs
such jobs as locating the beginning of the sequence data.
However, ^his function is not used for the FB-01.
• System real time message
This message synchronizes sequencer and rhythm units
when the automatic play function is used. These messages
include commands such as "play start", "play stop" and
"synchronous clock".
• System exclusive message
With the FB-01, the system exclusive messages are classified
into three groups as described below.
© Instrument message
This message specifies what is to be controlled with the
system number and instrument number. It controls the
instrument by changing (parameter change) the voice
data, instrument function data, voice function data, etc..
It also dumps the voice data set for each instrument.
© System message
This message specifies what is to be controlled with the
system number (system channel number). It changes the
parameter common to the system (parameter change)
and dumps the voice data for 48 voices and the configu¬
ration data.
(3) Channel message
This message specifies what is to be controlled with the
MIDI channel number. The FB-01 operates only when the
receiving channel coincides. The information that it con¬
trols is the same as the parameter change data of the in¬
strument message, however, the data to be controlled
can be specified with the channel number and not with
the instrument number.
System Channel Number
The system channel number is the channel number which
is necessary to transmit and receive the system message or
instrument message included in the system exclusive data.
The number can be set within the range from 1 to 16 by
using the SYSTEM SETUP, + 1 and - 1 switches.
The system channel number is entirely different from the
MIDI channel number.
When a number of FB-01 units are used in a system setup
and, if a different system channel number is assigned for each
FB-01, it is possible to control a particular FB-01.
FB-01 or Similar Unit
FB-01 FB-01 FB-01