User manual
12
APPENDIX
C
UNlT
HANDSHAKE
GROUP
The unit handshake group of messages can be used to see if an
X-15
is present on a
channel of a MIDI network.
After receiving an inbound
41
message, the
X-15
replies with an outbound
01
message.
There are no data bytes in either inbound or outbound messages.
PARAMETER
EXCHANGE
GROUP
The parameter exchange group of messages can be used to get or set the
X-15’s
operating parameters.
After receiving an inbound 4B message (or by pressing MODE and SIX on the front
panel), the
X-15
replies with a outbound
OB
message. The nineteen data bytes describe
the current operating parameters of the
X-15
If the
X-15
receives an inbound OB message, it is used to set the operating parameters.
The subsequent data bytes set the
X-15’s
operating parameters and store them to the
EEPROM.
UNIT STATUS
GROUP
The unit status group of messages can be used to determine the EEPROM was accessed
without incident, This is most useful after sending a parameter exchange message to the
X-15
to ensure it was written to the EEPROM.
After receiving an inbound
4D
message, the
X-15
sends an outbound
OD
message. The
two data bytes that follow reflect the state of the
X-l.%
EEPROM. The first byte is always
zero, and the second byte can be one of four possible values.
00
No EEPROM error has occurred
01
EEPROM write error
02 EEPROM read error
03
EEPROM read and write error
Nothing resets these error codes except removing power from the
X-15.
PARAMETER
EXCHANGE
DATA
FORMAT
The nineteen bytes that are part of an inbound or outbound
06
message are listed below.
byte
operational parameter
1
system channel
2
left pedal channel
3
right pedal channel
4
left pedal controller
5
right pedal controller
6
button 10 controller
7
button 1 controller
8
button 2 controller
9
button 3 controller
10
button 4 controller
11
button
5
controller
12
button 6 controller
13
button 7 controller
14
button 8 controller
15
button 9 controller
16
bypass
controller
17
bypass mode
18
merger mode
19
pedal rate
range
00
..
0F
00
..
0F
00
..
0F
00
.
78
00
.
.
78
00
.
78
00
..
78
00
..
78
00
..
78
00
..
78
00
..
78
00
..
78
00
..
78
00
.
.
78
00
..
78
00
..
78
00
.
.
05
00
.
.
01
00
..
0F
The bypass mode is one less than the value displayed
when
in the X-15's setup mode.