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Universal Nonrealtime System Exclusive Messages
Identity Request Message
Status
Data byte
F0H
7FH, 10H, 06H, 01H
Byte
Explanation
F0H
Exclusive status
7FH
ID number (universal realtime message)
10H
Device ID
06H
Sub ID#1 (General Information)
01H
Sub ID#2 (Identity Request)
F7H
EOX (End Of Exclusive)
* The "dev" is own device number or 7FH (Broadcast)
Data transmission
AT-20R/30R 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.
When keyboard part in MIDI-IN Mode: Mode-2, the exclusive message has a model ID of
62H and a device ID of 10H (17).
Data set 1DT1
This is the message that actually performs data transmission, and is used when you wish to
transmit the data.
Status
Data byte
F0H
41H, 10H, iiH, 12H, aaH, bbH, ccH, ddH, ... eeH, sum
Byte
Explanation
F0H
Exclusive status
41H
ID number (Roland)
10H
Device ID
iiH
Model ID (GS Part:42H, Keyboard Part:62H)
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 specified starting address and size. Refer to the
Address and Size given in Section 3 (p. 7).
* 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 (p. 14).
Status
F7H
Status
F7H
5
AT-20R/30R MIDI IMPLEMENTATION
2. Transmit data
Arranger and composer data can not be transmitted.
Channel Voice Messages
Note off
Upper Keyboard
Status
2nd byte
8nH
kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
: Initial Value = CH (ch.13)
kk = note number : 30H-67H (48-103)
* Note off message is sent out with the velocity of 40H.
Lower Keyboard
Status
2nd byte
8nH
kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
: Initial Value = BH (ch.12)
kk = note number : 1CH-67H (28-103)
* Note off message is sent out with the velocity of 40H.
Bass Pedalboard
Status
2nd byte
8nH
kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
: Initial Value = DH (ch.14)
kk = note number : 24H-3CH (36-60)
* Note off message is sent out with the velocity of 40H.
Note on
Upper Keyboard
Status
2nd bytes
9nH
kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
: Initial Value = CH (ch.13)
kk = note number : 30H-67H (48-103)
vv = note on velocity : 01H-7FH (1-127)
Lower Keyboard
Status
2nd bytes
9nH
kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
: Initial Value = BH (ch.12)
kk = note number : 1CH-67H (28-103)
vv = note on velocity : 01H-7FH (1-127)
Bass Pedalboard
Status
2nd bytes
9nH
kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
: Initial Value = BH (ch.12)
kk = note number : 24H-3CH (36-60)
vv = note on velocity : 01H-7FH (1-127)
Control Change
Bank Select (Controller number 0, 32)
Status
2nd bytes
BnH
00H
BnH
20H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
mm, ll = Bank number : 00H, 00H-7FH, 7FH (bank.1-bank.16384)
3rd byte
40H
3rd byte
40H
3rd byte
40H
3rd byte
vvH
3rd byte
vvH
3rd byte
vvH
3rd byte
mmH
llH
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