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Misc. info - remotely writing smpte, Sync stripe duplication and regeneration – M-AUDIO Mac Syncman User Manual

Page 17

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Misc. Info - Remotely Writing SMPTE

SYNCMAN is also capable of writing a SMPTE stripe with any specified
Offset. When SYNCMAN receives a Time Code Off-set message it will
automatically start writing SMPTE with the correct, specified Offset.
When started remotely, SYNCMAN will continue to write SMPTE until
a MIDI System Stop message is received or until the SYNCMAN Write
button is pressed. Mac Syncman comes with a utility that allows you to
control these and other functions right from the computer.

The MIDI messages that Mac Syncman responds to have the following
format:

MIDI Time Code Offset Message (in Hex):

$F0-$7E-00-04-00-00-%0ffhhhhh-Mn-Sc-Fm-

00-00-00-$F7
where hhhhh = hours (0 to 23)
and ff = SMPTE format*

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ff = 00 is 24 frames/sec

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ff = 01 is 25 frames/sec

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ff = 10 is 30 Drop frame

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ff = 11 is 30 Non-Drop frame
* IMPORTANT: Bits 5 and 6 of the hours byte contains the

SMPTE format of the SMPTE which will be written. Therefore
these bits must be set correctly to the desired SMPTE format.

MIDI System Stop Message (in Hex):

$F0-$7E-00-04-04-00-$F7

Sync Stripe Duplication and Regeneration

On occasion you may have to duplicate a sync stripe. This may is some-
times required if you have to move a SMPTE stripe from one tape to
another, or from one tape deck to another. The Mac Syncman Duplicate
feature only reshapes, it does not repair. If you need to repair a dam-
aged SMPTE stripe you will need to regenerate the stripe, not duplicate
it.