Yamaha DX21 - Manual (Page 23)

The data turned ON or OFF by this function consists of the following:
(a) KEY VELOCITY: Initial touch response data. Although the DX21
does not have key velocity sensitivity (keyboard
touch response), its tone generator is capable of
receiving key velocity information from an external
keyboard which has this capability.
(b) MODULATION WHEEL: Modulation wheel position.
(c) BREATH CONTROLLER: Breath controller pressure.
(d) PORTAMENTO FOOT SW: Portamento footswitch on/off status.
(e) PROGRAM CHANGE:
Voice memory selection.
(f) DATA ENTRY CONTROL: DATA ENTRY control position. Transmission only.
(g) DATA ENTRY SW: DATA ENTRY +1 and -1 switch status. Trans-
mission only.
Pitch bend, sustain switch and “all keys off” status data are transmitted whether
this function is ON or OF.
N O T E :
The above MIDI data is generally common to all keyboards and equipment
compatible with the MIDI system. Due to differences in the features provided
by some manufacturers, however, complete compatibility can not be guar-
anteed.
A7: SYSTEM INFORMATION
This function turns transmission and reception of MIDI SYSTEM EXCLUSIVE
INFORMATION data ON or OFF. The DATA ENTRY ON and OFF buttons are used
to turn this function ON or OFF. MIDI SYSTEM EXCLUSIVE INFORMATION
consists of voice parameters and related data which is transmitted by the BULK
TRANSMIT function (A8) described below. When this function is ON voice pa-
rameter changes made in the DX21 EDIT mode are transmitted in real time.
A8: BULK TRANSMIT
This function permits transmission of "32 Bulk Data”. That is, the data pertaining
to the 32 voices contained in the DX21 RAM voice memory. This data could be
transmitted, for example, to the RAM voice memory of another DX21.
When this function is called the LCD will read "Midi Transmit ?". Pressing the DATA
ENTRY YES button then begins actual transmission of the data. During transmission
the LCD will go blank. Transmission takes about two seconds.
NOTE:
System exclusive communication data is only useable with compatible Yamaha
MIDI equipment.
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