Boss Dr. Rhythm DR-770 Owner's Manual page 108

MIDI Implementation
System Common Messages
Recognized only when the DR-770 is in stop and "SYNC" of the MIDI mode is set at MIDI.
Song Position Pointer
Status Second
F2H llH
mm,ll = Value:
* Only in Song Play mode, the DR-770 receives Song Position Pointer, and locates the
position in the song.
Song Select
Status Second
F3H ssH
ss = Song number:
* When received in Song mode, it changes the songs.
* Indicates correspondence between Song number and Song as follows.
Song number Song
0 1
1 2
: :
99 100
System Realtime Message
Recognized only when "SYNC" of the MIDI mode is set at MIDI.
Timing Clock
Status
F8H
Start
Status
FAH
Continue
Status
FBH
Stop
Status
FCH
108
Third
mmH
00H,00H - 7FH,7FH (0 - 16383)
00H - 63H (0 - 99)
2. TRANSMITTED DATA
Channel Voice Message
Note Off
Status Second
9n kkH
n = MIDI Channel No.:
kk = Note No.:
Note On
Status Second
9nH kkH
n = MIDI Channel No.:
kk = Note No.:
vv = Velocity:
* Note number assigned to each instrument at current Drum kit is used.
* The data is transmitted by MIDI channel using the value set by MIDIch in MIDI mode.
* Gate time (the interval from "Note On" to "Note Off") is about 50msec. It may be
shortened when same instrument is sounded repeatedly in short interval.
Control Change
Volume
Transmitted when RxVOL is set to 'ON' in MIDI mode.
Status Second
BnH 07H
n = MIDI Channel No.:
vv = Volume:
* If a value of RxVOL in the MIDI mode is changed, the DR-770 transmit this message by
the MIDI channel set by MIDIch in MIDI mode.
Program Change
Transmitted when PRG is set to "ON" in the MIDI mode.
Status Second
CnH ppH
n = MIDI Channel No.:
pp = Program Number:
* The Program change will be transmitted on the MIDI channel set by "MIDIch" in the
MIDI mode if the Drum kit is changed.
* Indicates correspondence between Drum kit and Program number as follows.
Drum kit Program number
1 prog.1
2 prog.2
: :
128 prog.128
System Exclusive Messages
Status Data Bytes
F0H iiH,ddH,...,eeH
F0H: Status of System Exclusive Message
ii = ID number: 41 = Roland
7E = Universal Non-Realtime Message
7F = Universal Realtime Message
dd,...,ee = Data: 00H - 7FH (0 - 127)
F7H: EOX (End Of Exclusive)
Third
00H
0H - FH (ch.1 - ch.16)
1BH - 51H (27 - 81)
Third
vvH
0H - FH (ch.1 - ch.16)
1BH - 51H (27 - 81)
01H - 7FH (1 - 127)
Third
vvH
0H - FH (ch.1 - ch.16)
00H - 7FH (0 - 127)
0H - FH (ch.1 - ch.16)
00H - 7FH (prog.1 - prog.128)
Status
F7H