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MIDI Implementation
8
●Data Transmission
This instrument can receive the various parameters using System Exclusive messages.
The exclusive message of GS format data has a model ID of 42H and a device ID of
10H (17), and it is common to all the GS devices.
❍ Data Set 1 (DT1)
This is the message that actually performs data transmission, and is used when you
wish to transmit the data.
Status Data byte Status
F0H 41H, 10H, 42H, 12H, aaH, bbH, F7H
ccH, ddH, ... eeH, sum
Byte Explanation
F0H Exclusive status
41H ID number (Roland)
10H Device ID
42H Model ID (GS)
12H Command ID (DT1)
aaH Address MSB: upper byte of the starting address of
the transmitted data
bbH Address: middle byte of the starting address of the
transmitted data
ccH Address LSB: lower byte of the starting address of
the transmitted data
ddH Data: the actual data to be transmitted. Multiple
bytes of data are transmitted starting from the
address.
: :
eeH Data
sum Checksum
F7H EOX (End Of Exclusive)
* The amount of data that can be transmitted at one time depends on the type of
data, and data can be received only from the speci ed starting address and size.
Refer to the Address and Size given in Section 3.
* Data larger than 128 bytes must be divided into packets of 128 bytes or less. If
“Data Set 1” is transmitted successively, there must be an interval of at least 40 ms
between packets.
* Regarding the checksum, please refer to section 4 .
2. Transmit Data
■ Channel Voice Messages
●Note O
Status 2nd byte 3rd byte
8nH kkH vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
kk = note number: 00H-7FH (0-127)
vv = note o velocity: 00H-7FH (0-127)
●Note On
Status 2nd byte 3rd byte
9nH kkH vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
kk = note number: 00H-7FH (0-127)
vv = note on velocity: 01H-7FH (1-127)
●Control Change
❍ Bank Select (Controller Number 0, 32)
Status 2nd byte 3rd byte
BnH 00H mmH
BnH 20H llH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
mm, ll = Bank number: 00H, 00H-7FH, 7FH (bank.1-bank.16384)
❍ Expression (Controller number 11)
Status 2nd byte 3rd byte
BnH 0BH vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
vv = Control value: 00H-7FH (0-127)
❍ Hold 1 (Controller Number 64)
Status 2nd byte 3rd byte
BnH 40H vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
vv = Control value: 00H-7FH (0-127)
❍ Sostenuto (Controller Number 66)
Status 2nd byte 3rd byte
BnH 42H vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
vv = Control value: 00H, 7FH (0, 127) 0 = OFF, 127 = ON
❍ Soft (Controller Number 67)
Status 2nd byte 3rd byte
BnH 43H vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
vv = Control value: 00H-7FH (0-127)
❍ E ect 1 (Reverb Send Level) (Controller Number 91)
Status 2nd byte 3rd byte
BnH 5BH vvH
n = MIDI channel number: 0H-FH (ch.1-ch.16)
vv = Control value: 00H-7FH (0-127)
●Program Change
Status 2nd byte
CnH ppH