Boss Audio Systems BR-900CD Midi Time Code Quarter Frame Messages, Song Position Pointer, Start

DIGITAL RECORDING STUDIO	Date: Jan. 11, 2005
Model BR-900CD	Version: 1.00

MIDI Implementation

1. TRANSMITTED DATA

*This message is transmitted according to a SMF data regardless of the followings when the data is played.

■Channel Voice Message

●Note On

If the MIDI parameter “RhyMIDI ch” is set to “1–16,” note numbers/velocities corresponding to the Rhythm pattern will be transmitted on the MIDI channel that is specified for the Rhythm.

Status	Second	Third
9nH	mmH	llH
n = MIDI Channel No.:		0H - FH (ch.1 - ch.16)
mm = Note No.:		00H - 7FH (0 - 127)
ll = Velocity:		01H - 7FH (1 - 127)

●Note Off

If the MIDI parameter “RhyMIDI ch” is set to “1–16,” note numbers corresponding to the Rhythm pattern will be transmitted on the MIDI channel specified for the Rhythm.

Status	Second	Third
8nH	mmH	llH

Frame Count	xxxyyyyy
	xxx	Reserved (000)
	yyyyy	Frame No. (0-29)
Seconds Count	xxyyyyyy
	xx	Reserved (00)
	yyyyyy	Seconds (0-59)
Minutes Count	xxyyyyyy
	xx	Reserved (00)
	yyyyyy	Minutes (0-59)
Hours Count	xyyzzzzz
	x	Reserved (0)

yyTime Code type

*The time code types defined by the MIDI specification correspond to the BR-900CD Sync parameter “MTC Type” as follows.

MIDI specification setting		“MTC Type” setting
0	= 24 Frames/Sec	24
1	= 25 Frames/Sec	25
2	= 30 Frames/Sec (Drop Frame)	29D
3	= 30 Frames/Sec (Non Drop Frame)	29N or 30

zzzzz Hours (0–23)

n = MIDI Channel No.:	0H - FH (ch.1 - ch.16)
mm = Note No.:	00H	- 7FH (0 - 127)
ll = Velocity:	40H	(64)

❍Notes sounded by the Rhythm correspond to note numbers as follows.

Rhythm Tone	Note Number
Cross Stick	G 1	(31)
Metronome (click)	A 1	(33)
Metronome (bell)	A#1	(34)
Kick	C 2	(36)
Snare	D 2	(38)
Tom 4	F 2	(41)
Closed hi-hat	F#2	(42)
Tom 3	A 2	(45)
Open hi-hat	A#2	(46)
Tom 2	C 3	(48)
Crash cymbal	C#3	(49)
Tom 1	D 3	(50)
Ride cymbal	D#3	(51)
Cowbell	G#3	(56)

■System Common Messages

●MIDI Time Code Quarter Frame Messages

If the Sync parameter “Sync Gen” is set to “MTC,” quarter frame messages of the time code type specified by “MTC Type” will be transmitted when the BR-900CD is running (recording or playing). The transmitted time counts are summed to “SMPTE (MTC) Offset Time” as the song top is “00:00:00:00”.

Status	Second
F1H	mmH (= 0nnndddd)
nnn = Message type:		0 = Frame count LS nibble
		1	= Frame count MS nibble
		2	= Seconds count LS nibble
		3	= Seconds count MS nibble
		4	= Minutes count LS nibble
		5	= Minutes count MS nibble
		6	= Hours count LS nibble
		7	= Hours count MS nibble
dddd = 4 bit nibble data:		0h - FH (0 - 15)

●Song Position Pointer

The current position is transmitted by the Song Position Pointer Message when the BR- 900CD is stopped, or the locate operation has been performed, if the SYNC parameter “Sync Gen” is set to “MCK.”

Status	Second	Third
F2H	mmH	nnH

mm (LSB), nn (MSB) = Song Position Point: 00H 00H - 7FH 7FH

■System Realtime Message

Transmitted when “Sync Gen” is “MCK” in the SYNC parameter.

●Timing Clock

Status

F8H

●Active Sensing

Status

FEH

*This is transmitted at intervals of approximately 200 msec.

●Start

Status

FAH

●Continue

Status

FBH

●Stop

Status

FCH

Bit Field is assigned as follows.

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