17
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.
