Yamaha DX9 Operating Manual page 22

MIDI
MIDI (Musical Instrument Digital Interface)
The MIDI terminal is for external control of electronic
musical instruments. Any instrument equipped with a MIDI
terminal can be connected using the MID I cable and used
for transmitting data to the instrument.
MIDI can be used for the following types of data trans-
mission and control:
• Real-Time Control
This is used for controlling more than one electronic
musical instrument at once using a sequencer to form a
musical ensemble. It can also be used to contro l a second
electronic musical instrument via the keyboard of the
main instrument.
1. Key pitch ON/ OFF, etc.
2. Pitch bend, modulation wheel, sustain switch, etc.
3. Voice number.
• Connecting the MIDI cable
l
I
i
I I
IN
OUT
IN
OUT THRU
CONPUTER/
SYNTH A
SOUENCER
CH 1
Fig. 1
As can be seen in figure 1, the data output from the se-
quencer is transmitted via a single MIDI cable and input
to synthesizer A, where it is sent to the next instrument
to be controlled via the THRU terminal. In this case, the
sequencer is outputting multi-channel data. Therefore, the
desired channel number on the receiving side must be
selected accordingly. Both the sending side and the receiv-
ing channel numbers will have to be specified with the
system shown in figure 2.
• Selecting the Receiving Channel
While the unit is in the FUNCTION mode,
pressing ~
will produce the display shown in the figure. The selec-
tion of the Ml Dl receiving channel number can be carried
out using the DATA ENTRY controls. Select system
information YES/NO for both the receiver and the trans-
mitter. Pressing
D
again will produce the display "SYS
INFO UNAVAIL". Press [Q}Ti tochangethisto"AVAIL",
and the instrument will enter the system information trans-
mit/receive mode.
<21
>
• System Information
Certain types of data can be transferred between certain
groups of instruments of the same manufacturor.
The following types of data can be exchanged using the
YAMAHA DX9 and/or DX7.
1. Data for one voice or for all voices.
2. The data for a single parameter within a certain voice.
3. The data for a single parameter within the FUNCTIONS.
i
I
IN
THRU
SYNTH B
CH 2
l
I
IN
OUT
SYNTH A
Fig. 2
FUNCTION
L~
i
IN
AUTO RHYTHM
CH 3
i
I
IN
OUT
SYNTH B
FUNCTION CONTROL
~liD! CH= 1
pressing
DATA ENTRY
l
press
Channel number can be
carried out using the
Data Entry controls.
NO YES
..-'-"------1-
1
--,11'-::-:-:---+
1
- - - '
OFF ON