Creative 1820M Example Smpte Connection, Duplicating Smpte time code, Other Tips for using Smpte

7 - Appendix

SMPTE Background

Duplicating SMPTE time code

The Sync Daughter Card always generates clean SMPTE from the SMPTE output when reading SMPTE in. This time code is in sync with the incoming SMPTE and can be used to feed other devices in your studio or to clean up old SMPTE tracks. Copying SMPTE code from track to track produces deterioration of the signal with each generation, although one generation of dubbing will probably be OK.

Other Tips for using SMPTE

1.Use ascending time code. Jumps in the code are OK as long as the SMPTE code jumps forward in time as the tape moves forward in time. A good way to avoid any problems with this is to simply stripe the entire project with SMPTE before you record any other tracks.

2.Allow enough leader. Leave a few seconds between each song to allow SMPTE to sync up before the song starts.

Keep written logs. Keeping written records of song start points and edit cues can save time and avoid wasteful searching through a project that was recorded earlier.

Example SMPTE Connection

In the diagram below, Cubase is controlling the entire system by sending MTC to the Sync Card which converts MTC to SMPTE. SMPTE is fed to the ADAT/BRC to convey the absolute time information (hours-minutes-seconds-frames). ADAT/BRC is the word clock master, controlling the Digital Audio System either through the embedded clock in the ADAT optical stream or using word clock.

1010 SYNC

Cubase

CARD	CARD		BRC
ADOCK
											M A S T E R		R E M O T E			C O N T R O L
					RECORD						PITCH CONTROL		TAPE LOCATION					NORMAL		DISPLAY TYPE		EJECT
											CENTS		HOURS	MINUTES SECONDS FRAMES
	optional				INPUT													SMPTE
										PITCH UP								BARS
		65	66	67	68	69	70	71	72	PITCH DOWN	FIXED	VARIABLE							DISPLAY MODE RESET 0			FORMAT TAPE
		1	2	3	4	5	6	7	8		PITCH MODE			BARS	BEATS	SUB BEATS		ABSOLUTE
		33	34	35	36	37	38	39	40									RELATIVEE
	if ADAT	97	98	99	100	101	102	103	104									DROP FRAME
					INPUT													24 FPS			SMPTE START
																		30 FPS
					RECORD					PITCH MODE								29.97 FPS		SMPTE	OFFSET	EXT SYNC
	sync isn't										SMPTE IN	MIDI IN						25 FPS
		105	106	107	108	109	110	111	112										COPY TAPE
		9	10	11	12	13	14	15	16		NAME
		41	42	43	44	45	46	47	48					CURSOR
ADAT		73	74	75	76	77	78	79	80
	used				RECORD					MIDI UTIL	TEMPO MAPRECORD XFADE								AUTO-PUNCH PRE-ROLL		POST-ROLL
					INPUT								STUV7	WXYZ8		(CHARS)0
In		17	18	19	20	21	22	23	24
		49	50	51	52	53	54	55	56	COPY SONGDELETE SONGSAVE SETUP			4	5		6			LOOP	TAPE OFFSETTRACK DELAY
		81	82	83	84	85	86	87	88		TO TAPE
		113	114	115	116	117	118	119	120				JKL	MNO		PQR
					RECORD						LOAD SETUP
					INPUT					SET LOCATELOCATE SONGFROM TAPE			1	2		3			DIGITAL I/O	GEN SYNC	EDIT
													ABC	DEF		GHI
		25	26	27	28	29	30	31	32
		57	58	59	60	61	62	63	64
		89	90	91	92	93	94	95	96
	LTC	121	122	123	124	125	126	127	128
		TRACK 1-32		TRACK 33-64	TRACK 65-96		TRACK 97-128				LOCATE 0								AUTO PLAY		REHEARSE
		AUTO INPUT		ALL SAFE	ALL INPUT		ALL CLEAR				SET LOCATE
													REWIND	FAST FORWARD			S T O P		P L A Y	R E C O R D
		GROUP 1		GROUP 2	GROUP 3		GROUP 4	SET GROUP			LOCATE

PatchMix DSP set to	ADAT 9-pin
	ADAT
ADAT Sync

ADAT Optical

carries embedded word clock

REWIND FAST FWD STOP PLAY RECORD EJECT

The Sync Card should not be used as both the SMPTE and word clock master. Word Clock is generated by the Digital Audio System and NOT by the software application (Cubase). SMPTE is not locked to Word Clock inside the Sync Card—they are completely independent.

E-MU Digital Audio System 97