Roland AT-20R Midi Implementation Manual

Model: AT-20R/30R
Date: Feb.1.1999
Version: 1.01
1. Receive data
Channel Voice Messages
Note off
Status 2nd byte
8nH kkH
9nH kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
kk = note number : 00H-7FH (0-127)
vv = note off velocity : 00H-7FH (0-127)
* For Drum Parts, these messages are received when Rx.NOTE OFF = ON for each
Instrument.
* The velocity values of Note Off messages are ignored.
Note on
Status 2nd bytes
9nH kkH
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)
* Not received when Rx.NOTE MESSAGE = OFF. (Initial value is ON)
* For Drum Parts, not received when Rx.NOTE ON = OFF for each Instrument.
Polyphonic Key Pressure
Status 2nd bytes
AnH kkH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
kk = note number : 00H-7FH (0-127)
vv = key pressure : 00H-7FH (0-127)
* Not received when Rx.POLY PRESSURE (PAf) = OFF. (Initial value is ON)
* The resulting effect is determined by System Exclusive messages. With the initial
settings, there will be no effect.
* Not Recieved in Keyboard Part.
Control Change
* When Rx.CONTROL CHANGE = OFF, all control change messages except for Channel
Mode messages will be ignored.
* The value specified by a Control Change message will not be reset even by a Program
Change, etc.
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), Initial Value = 00 00H
(bank.1)
* Not received when Rx.BANK SELECT = OFF. "Rx.BANK SELECT" is set to OFF by
"Turn General MIDI System On," and set to ON by "GS RESET." (Power-on default value
is ON.)
* Bank Select processing will be suspended until a Program Change message is received.
* The GS format "Variation number" is the value of the Bank Select MSB (Controller
number 0) expressed in decimal.
* Not Recieved in Keyboard Part.
Modulation (Controller number 1)
Status 2nd bytes
BnH 01H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Modulation depth : 00H-7FH (0-127)
* Not received when Rx.MODULATION = OFF. (Initial value is ON)
* The resulting effect is determined by System Exclusive messages. With the initial
settings, this is Pitch Modulation Depth.

MIDI IMPLEMENTATION

3rd byte
vvH
00H
3rd byte
vvH
3rd byte
vvH
3rd byte
mmH
llH
3rd byte
vvH
Portamento Time (Controller number 5)
Status 2nd bytes
BnH 05H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Portamento Time : 00H-7FH (0-127), Initial value = 00H (0)
* This adjusts the rate of pitch change when Portamento is ON or when using the Porta-
mento Control. A value of 0 results in the fastest change.
Data Entry (Controller number 6, 38)
Status 2nd bytes
BnH 06H
BnH 26H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
mm, ll = the value of the parameter specified by RPN/NRPN
Volume (Controller number 7)
Status 2nd bytes
BnH 07H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Volume : 00H-7FH (0-127), Initial Value = 64H (100)
* Volume messages are used to adjust the volume balance of each Part.
* Not received when Rx.VOLUME = OFF. (Initial value is ON)
* Not Recieved in Keyboard Part.
Pan (Controller number 10)
Status 2nd bytes
BnH 0AH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = pan : 00H-40H-7FH (Left-Center-Right), Initial Value = 40H (Center)
* For Rhythm Parts, this is a relative adjustment of each Instrument's pan setting.
* Not received when Rx.PANPOT = OFF. (Initial value is ON)
* Not Recieved in Keyboard Part.
Expression (Controller number 11)
Status 2nd bytes
BnH 0BH
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Expression : 00H-7FH (0-127), Initial Value = 7FH (127)
* It can be used independently from Volume messages. Expression messages are used for
musical expression within a performance; e.g., expression pedal movements, crescendo
and decrescendo.
* Not received when Rx.EXPRESSION = OFF. (Initial value is ON)
* Not Recieved in Keyboard Part.
Glide (Controller number 16)
Status 2nd bytes
BnH 10H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Control value : 00H-7FH (0-127) 0-63 = OFF, 64-127 = ON
* It can be used on only keyborad part. Not recieved on GS part.
Hold 1 (Controller number 64)
Status 2nd bytes
BnH 40H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Control value : 00H-7FH (0-127)
* Not received when Rx.HOLD1 = OFF. (Initial value is ON)
Portamento (Controller number 65)
Status 2nd bytes
BnH 41H
n = MIDI channel number : 0H-FH (ch.1-ch.16)
vv = Control value : 00H-7FH (0-127) 0-63 = OFF, 64-127 = ON
* Not received when Rx.PORTAMENTO = OFF. (Initial value is ON)
1
3rd byte
vvH
3rd byte
mmH
llH
3rd byte
vvH
3rd byte
vvH
3rd byte
vvH
3rd byte
vvH
3rd byte
vvH
3rd byte
vvH