System Exclusive Data Format
SYSTEM EXCLUSIVE DATA FORMAT
Reading this section will not necessarily help you use the TX81Z. This data is provided to comply with the
MIDI Specification, and will be helpful to those who write computer programs to process TX81Z data.
The TX81Z has three types of System Exclusive message; Parameter Change messages, Bulk Data messages and
Dump Request messages.
PARAMETER
CHANGE
MESSAGES
These messages change the value of a parameter in TX81Z memory, There are
8 subgroups of Parameter Changes; VCED, ACED, PCED, Remote Switch,
Micro Tuning, Program Change, Effect data and System data.
VCED, ACED, PCED and Remote Switch parameter change messages have the
following format.
11110000
F0h Exclusive
01000011 43h
I.D. number (Yamaha)
0001nnnn 1nh Basic receive channel
0ggggghh ggggg = Group number, hh = Subgroup number
0ppppppp ppppppp = Parameter number
0ddddddd ddddddd = Data
11110111 F7h End Of Exclusive
*VCED (Voice parameters compatible with DX21/27/100)
ggggg = 00100 (4), hh = 10 (2)
See p.71 for parameter numbers and data.
*ACED (Additional voice parameters for TX81Z)
ggggg = 00100 (4), hh = 11 (3)
See p.73 for parameter numbers and data.
*PCED (Performance parameters)
ggggg = 00100 (4), hh = 11 (3)
See p.74 for parameter numbers and data.
*Remote Switch (The same effect as pressing a switch on the TX81Z front
panel, ie. “remote control”.)
ggggg = 00100 (4), hh = 11 (3), ddddddd = 0 (off), 7F (on)
See p.75 for switch numbers.
System Parameter Change (basic receive channel settings, etc.) and Effect
Parameter Change (data for delay, pan and chord) messages have the following
format.
11110000
F0h
Exclusive
01000011
43h
I.D. number (Yamaha)
0001nnnn
1nh
Basic receive channel
0ggggghh
ggggg = 00100 (4), hh = 00 (0)
0ppppppp
ppppppp = 1111011 (123) = System Parameter
1111100 (124) = Effect Parameter
0kkkkkkk
kkkkkkk = Parameter number
–67–