Yamaha DX21 - Page 10

DX21
DX21
(1) Parameter Change
Status
11110000
ID no.
01000011
Substatus/ch. no.
0001nnnn
n=channel no.
Parameter group no.
00010010
Perameter no.
Oppppppp
Data
Oddddddd
EOX
11110111
This data is transmitted when voice or function parameters are changed in the EDIT
or FUNCTION modes. The voice parameters transmitted are those given in voice
parameter table 5-2, and the function parameters transmitted are shown in function
parameter table 5-3.
(2) 1 Voice Bulk Data
Status
11110000
ID no.
01000011
Substatus/ch. no.
OOOOnnnn
n=channei no.
Format no.
00000011
Byte count
00000000
Byte count
01011101
Data
Oddddddd j
1
93 bytes
Oddddddd
Checksum
Oeeeeeee
EOX
11110111
The data for one voice is transmitted when a voice selector is pressed in the PLAY
SINGLE mode. Data in the voice edit buffer is transmitted when a format no. f=3
dump request is received.
The transmitted data is showm in voice parameter table
5-2. The checksum is the lowest 7 bits of the two's complement sum of all data
bytes (the same applies below).
(3) 32 Voice Bluk Data
Status
11110000
ID no.
01000011
Substatus/ch. no.
OOOOnnnn
n=channel no.
Format no.
00000100
Byte count
00100000
Byte count
00000000
Data
Oddddddd
1
4096 bytes
Oddddddd
Checksum
Oeeeeeee
EOX
11110111
The data of all 32 voices in RAM memory will be transmitted if the YES (or BULK)
key is pressed in response to the "MIDI Transmit?" display which appears when
the BULK key is pressed in the FUNCTION mode. The data for all 32 voices will
also be transmitted when a format no. f=4 dump request is received. The transmitted
data is shown in voice data table 5-1. 55 bytes of 0's are added to the 73 bytes
in this table, so 128 bytes are transmitted for each voice. 4096 bytes are therefore
transmitted for all 32 voices.
9