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8 - Synchronization with other DTRS units
50
TASCAM DA-78HR
8.4 Digital dubbing
When you copy tapes between DTRS units in the
digital domain, there is no loss of quality. A “work-
tape” or copy is therefore indistinguishable from the
original. Additionally, the DA-78HR uses low-cost
media (Hi 8 video cassettes), which makes it easy to
back up important projects.
NOTE
When you copy tracks from DA-88 units, the word
length shoul d be set to 16 bi ts (5.4.2, “Selecti ng in put
word length”).
You may want to exploit these features of the DTRS
system to make archive copies, and “safety copies”
of important material (see 1.5, “Recommended
tapes” for our suggestions on tape use).
1
With the power to all units turned OFF, make
the synchronization connections as described
in 8.1, “Synchronization connections”.
Remember to terminate the slave unit.
2
Connect the
DIGITAL I/O
of the master unit
(source) to the
DIGITAL I/O
of the slave (target).
Use only the approved cables (PW-88D or PW-
88DL) to connect the DTRS units. Use of any
other cables can cause damage to the units and
will invalidate the warranties.
3
Turn on both units. Make sure the machines’
IDs are correctly set (8.2.2, “Setting machine
ID”).
4
Insert the master tape into the source master
and a blank tape, formatted with the same
sampling frequency and with the same record-
ing resolution as the master tape, into the tar-
get sl ave.
5
Select “all digital” as the input source on the
target slave (5.3, “Input selection”).
6
Put the target slave machine into
CHASE
mode
(8.2, “Machine ID and master/slave settings”).
7
Locate the master tape to a point before the
material you want to duplicate.
The target slave will also locate since it is in
chase mode.
8
Arm all tracks (
REC FUNCTION
) on the target
slave machine.
9
Make sure that all
REC FUNCTION
switches on
the source master are turned OFF.
NOTE
If any
REC FUNCTION
switches on the source mas-
ter are turned on, you will erase your master tape!
You may want to use the tape’s write-protect tab
(5.2.3, “Write-protecting cassettes”).
10
On the master machine, hold down
RECORD
and press
PLAY
.
No recording will take place on the source mas-
ter, but the tracks will be recorded digitally on
a one-to-one basis to the target slave.
There is no need to carry out any special pre-
dubbing procedure such as timing the digital
output – the digital and analog outputs are sep-
arate.
You can use the input patchbay on the target
slave machine (5.3.2, “Input patchbay rout-
ing”) to transfer tracks from the source master
tape to d ifferent tracks on the target slave.
Note that you cannot combine tracks by this
method.
8.5 Synchronized formatting
When several units are connected together, you can
format several tapes simultaneously, using one
machine as the master. This can be a very convenient
way of saving time and effort.
1
Make sure that all machines are connected
together using the
SYNC
connections, as
described above, and that the last unit in the
chain is terminated.
2
Load a blank unformatted tape into each
DTRS unit.
Make sure all tapes are the same length.
SOURCE
MASTER
TA RG ET
SLAVE
PW-88D or PW-88DL
(digital I/O ca ble)
PW-88S
(sync cable)
Terminator
plug