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8 - Synchronization with other DTRS units
TASCAM DA-78HR
49
2
Press and hold down the ▲ key and press the
▼
key to reset the value.
Machine offset will now be cancelled and the
OFF SE T
indicator will go out.
8.3.3 Setting machine offset “on the fly”
As well as entering an absolute number, it is also pos-
sible to enter a number “on the fly” as the tapes are
playing.
1
Locate the two tapes (master and s lave) so th at
they have the right offset, either by playing the
tapes and pausing them or carry out the next
operation while one or both tapes is being
played back.
2
On the slave unit to be offset, press and hold
the
SHIFT
key, and press the
AUTO IN /OUT
(
OFFSET
) key at the correct offset time to cap-
ture and store the offset.
The display will briefly show
AT. OFFSET (
AT
OFF SET
), and the current difference between
the master and slave tapes will be stored as an
offset.
NOTE
S
The value entered in this way can be edited later using the
technique described above.
You cannot determine the offset from an unformatted
tape, or if either tape is currently displaying a nega-
tive ABS value.
8.3.4 An example of setting offsets
A practical example of setting offsets is given here.
The master DA-78HR contains the tape with the dia-
log and reference tracks from the video worktape.
Another DA-78HR (the slave) has a tape with some
tracks containing video backing music. It is neces-
sary to produce an offset between the two so that
when the master is played, the music tracks will start
at the correct time relative to the dialog and reference
tracks.
1
Locate the slave tape with the backing music to
th e start of th e music.
The shuttle mode is useful here (see 7.7, “Shut-
tle operations”).
2
Rewind the master to a little before you want
the music to enter.
3
Start playing the master DA-78HR.
4
When the music entry point is reached, press
and hold the
SHIFT
key
and press the
AU TO IN /
OUT
key to capture the offset point.
5
Stop the master, an d set the slave into
CHASE
mode (8.2.3, “Master/slave settings (CHASE
mode)”).
6
Rewind the master to a little before the music
entry and start playing.
The slave machine should now foll ow the tran s-
port movements of the master, with the appro-
priate offset, so that the music enters at the
right point.
Connection from
SYNC OUT
to
SYNC IN
Press the
▲
▲▲
▲
or
▼
▼▼
▼
key at
this point. Offset will be
set to
00:02:21 18
Copy of video worktape audio tracks
Backing music
Start of tape
Start of tape
Start of video Music entry
01:00:00:0000:57:00:00
01:02:21:1801:00:00:0000:57:00:00
Start of music (tape is
cued here)