Making A 16-Bit Copy From A 20-Bit Master - Alesis ADAT-XT20 Reference Manual

Chapter 5: Multiple ADAT-XT20 Operation
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Be sure that the RECORD ENABLE buttons are switched off for tracks
1–8 of the master XT20 and the write-protect tab (or record tab) is
removed (open).
PLAY
[
Press both
Since this is the master machine (ID 1), it will simply enter play (since
none of its tracks are in record-ready) while engaging record on the
slave machine.
STOP] on the master XT20 after backing up is complete.
Press [
If a tape is in very bad condition, you may have difficulty copying it
from the master XT20 to a slave. If the error count is so high that the
XT20 momentarily loses sync during playback, all following slaves will
be taken out of record automatically. In this case, put the new tape into
the master, and the damaged tape in the slave, and copy from the
slave to the master.
16-
AKING A BIT COPY FROM A
With over 100,000 original ADAT 16-bit Type I machines in use, you
may wish to trade tapes with someone who owns an older machine. You
can still work with your XT20 in 20-bit Type II mode, and make Type I
"clones" for use in older machines. You can also use an older Type I
machine as a slave to an XT20, using the same procedures and hookup
listed earlier in this chapter.
To make a "dithered" 16-bit copy:
Insert a 16-bit formatted tape into the slave machine.
If the slave is an XT20, the
Press the [DIGITAL OUT] button (located on the right above
the RECORD button) until the display reads:
Ovt 16dt
ABS
This adds dither, a specially shaped mathmatical noise, to the
conversion process which "smoothes out" the transition at low levels
and allows you to get better resolution even though the result is still 16-
bit.
Make a digital backup as described on the previous page.
RECORD] on the master XT20.
]
[
and
20-
16 BIT icon will light in the display.
ADAT XT20 Reference Manual
BIT MASTER