MIDI System Common Messages

**MIDI System Common Messages**
Status Byte	Data Bytes		Message		Description
F1	md		MIDI Time Code Quarter Frame		MTC Quarter Frame This message is an alternative to the MIDI Timing clock, and is used in applications where more sophisticated timing control is required, such as fast-forwarding, rewind, and shuttle controls. Any unused data bits should be set to 0 by the transmitter, and ignored by the receiver.
			Value	Range	Description
			m	`0-7`	Message Type	See detailed descriptions below
			d	`0-F`	Data nibble (4 bits)	As determined by Message Type
			Message Type	Data Nibble	Description
			m=0	d=`ffff`	Frame Count, LS	5 bits Range: 0-1D (0-29)
			m=1	d=`000f`	Frame Count, MS	5 bits Range: 0-1D (0-29)
			m=2	d=`ssss`	Seconds Count, LS	6 bits Range: 0-3B (0-59)
			m=3	d=`00ss`	Seconds Count, MS	6 bits Range: 0-3B (0-59)
			m=4	d=`mmmm`	Minutes Count, LS	6 bits Range: 0-3B (0-59)
			m=5	d=`00mm`	Minutes Count, MS	6 bits Range: 0-3B (0-59)
			m=6	d=`hhhh`	Hours Count, LS	Hours Count (hhhhh): 5 bits Range: 0-17 (0-23)
			m=7	d=`0tth`	Hours Count, MS + Time Code Type (tt)	Hours Count (hhhhh): 5 bits Range: 0-17 (0-23)
			m=7	d=`0tth`	Hours Count, MS + Time Code Type (tt)	Time Code Type (tt): 2 bits Range: 0-3
			Time Code Type		Description
			tt=0		24 Frames/second
			tt=1		25 Frames/second
			tt=2		30 Frames/second (Drop-Frame)
			tt=3		30 Frames/second (Non-Drop)
Status Byte	Data Bytes		Message		Description
F2	lsb	msb	Song Position Pointer		Set the Song Position Pointer in a sequencer The song position is set to 6x the number of MIDI Timing Clocks from the start of the sequence, ie: 6 x ( 128x msb + lsb ) Clocks
			Value	Range	Description
			lsb	`00-7F`	Least significant byte	`00`=start
			msb	`00-7F`	Most Significant Byte	`00`=start
Status Byte	Data Bytes		Message		Description
F3	ss		Song Select		Select song 'ss' in a sequencer
			Value	Range	Description
			ss	`00-7F`	Song Number	`00` = first song
Status Byte	Data Bytes		Message		Description
F4	-		Undefined		The current Running Status is cancelled
Status Byte	Data Bytes		Message		Description
F5	-		Undefined		The current Running Status is cancelled
Status Byte	Data Bytes		Message		Description
F6	-		Tune Request		Retune request for Analogue synthesizers
Status Byte	Data Bytes		Message		Description
F7	-		End of System Exclusive		End-marker for System Exclusive messages

midi_system_real_time.html Contents midi_system_exclusive.html