MIDI Implementation
MIDI Pedalboard PK-9
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6. MIDI Implementation

Recognized Receive Data

■ System Realtime Messages
● Status
FEH
* By receiving an Active Sensing message, the PK-9 enters
the mode timing the interval between incoming MIDI
messages. If the interval exceeds 500ms, the PK-9 trans-
mits Note Off messages corresponding to the transmitted
notes being On, and returns from this mode.
■ System Exclusive messages
Data Set 1 (DT1) is the only System Exclusive messages
received by the PK-9.
● Data set 1 DT1 (12H)
Address of parameter groups
■ All other messages received
The messages received via MIDI IN are mixed (“merged”)
with the PK-9’s MIDI messages and transmitted via MIDI
OUT (“Soft Thru” function).

Transmitted Data

■ Channel Voice Messages
● Note off
● Note on
● Control Change
❍ Modulation (Controller number 1)❍ Portamento Time (Controller number 5)❍ Volume (Controller number 7)❍ Pan (Controller number 10)❍ Expression (Controller number 11)❍ General Purpose (Controller number 16)❍ General Purpose (Controller number 17)

Model: PK-9 MIDI Pedalboard Date: January, 2012

Version: 1.00

Status Data byte Status
F0H 41H, 10H, 00H, 02h, 12H, aaH, bbH,
ccH, ddH, ... eeH, sum F7H
Byte Explanation
F0H Exclusive status
41H ID number (Roland)
10H Device ID
00H Model ID (MSB)
02H Model ID (LSB)
12H Command ID (DT1)
aaH Address MSB: upper byte of the
starting address of the data to be
sent (12H).
bbH Address: middle byte of the starting
address of the data to be sent
(Parameters Group address 00H –
03H).
ccH Address LSB: lower byte of the
starting address of the data to be
sent (00H)
ddH Data: the actual data to be sent.
Multiple bytes of data are
transmitted in order starting from
the address.
: :
eeH Data
sum Checksum
F7H EOX (End Of Exclusive)
Address(H) Parameter group
13 00 00 Retrigger, Velocity, Touch, Portamento Time,
Octaver Value, Pedal Assign, Transpose,
Octave, MIDI Channel
Status 2nd byte 3rd byte
8nH kkH 00H
n= MIDI channel number 0H~FH (Ch.1~16)
kk= note number 00H~7FH (0~127)
vv= note off velocity 00H~7FH (0~127)
Status 2nd byte 3rd byte
9nH kkH vvH
n= MIDI channel number: 0H~FH (Ch.1~16)
kk= note number: 00H~7FH (0~127)
vv= note on velocity: 01H~7FH (1~127)
Status 2nd byte 3rd byte
BnH 01H vvH
n= MIDI channel number: 0H~FH (Ch.1~16)
vv= Modulation depth: 00H~7FH (0~127)
Status 2nd byte 3rd byte
BnH 05H vvH
n= MIDI channel number: 0H~FH (Ch.1~16)
vv= Portamento Time: 00H~7FH (0~127),
Status 2nd byte 3rd byte
BnH 07H vvH
n= MIDI channel number 0H~FH (Ch.1~16)
vv= Volume: 00H~7FH (0~127)
n =MIDI channel: 0H - FH (ch.1 - 16)
vv =expression: 00H - 7FH (0 - 127)
Status 2nd byte 3rd byte
BnH 0AH vvH
n= MIDI channel number: 0H~FH (Ch.1~16)
vv= Pan: 00H~40H~7FH (Left~Center~
Right),
Status 2nd byte 3rd byte
BnH 0BH vvH
n =MIDI channel: 0H - FH (ch.1 - 16)
vv =expression: 00H - 7FH (0 - 127)
Status 2nd byte 3rd byte
BnH 10H vvH
n= MIDI channel number: 0H~FH (Ch.1~16)
vv= Control value: 00H~7FH (0~127)
Status 2nd byte 3rd byte
BnH 11H vvH
n= MIDI channel number: 0H~FH (Ch.1~16)
vv= Control value: 00H~7FH (0~127)
PK-9_multi.book Page 111 Monday, April 23, 2012 3:03 PM