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MOTU AUDIO CONSOLE
41
Master Clock Source
The Master Clock Source determines the digital
audio clock that the 896mk3 will use as its time
base. For a complete explanation of synchroni-
zation issues, see “Making sync connections” on
page 28. The following sections briefly discuss each
clock source setting.
Internal
Use the Internal setting when you want the 896mk3
to operate under its own digital audio clock. For
example, you may be in a situation where all you
are doing is playing tracks off hard disk in your
digital audio software on the computer. In a
situation like this, you most often don’t need to
reference an external clock of any kind.
Another example is transferring a mix to DAT. You
can operate the 896mk3 system on its internal
clock, and then slave the DAT deck to the 896mk3
via the AES/EBU connection (usually DAT decks
slave to their AES/EBU input when you choose the
AES/EBU input as their record source) or via the
896mk3’s word clock output (if your DAT deck has
a word clock input).
If you would like help determining if this is the
proper clock setting for your situation, see
“Making sync connections” on page 28.
Word C l o c k I n
The Word Cl ock In setting refers to the Word Clock
In BNC connector on the 896mk3 rear panel.
Choosing this setting allows the 896mk3 to slave to
an external word clock source, such as the word
clock output from a digital mixer.
S/PDIF
The S/PDIF clock source setting refers to the
S/PDIF RCA input jack on the 896mk3. This
setting allows the 896mk3 to slave to another
S/PDIF device.
Use this setting whenever you are recording input
from a DAT deck or other S/PDIF device into the
896mk3. It is not necessary in the opposite
direction (when you are transferring from the
896mk3 to the DAT machine).
For further details about this setting, see “Syncing
S/PDIF devices” on page 29.
AES/EBU
The AES/EBU clock source setting refers to the
AES/EBU input connector on the 896mk3. This
setting allows the MOTU 896mk3 to slave to
another AES/EBU device.
Use this setting whenever you are recording input
from a DAT deck or other AES/EBU device into the
896mk3. It is not necessary in the opposite
direction (when you are transferring from the
896mk3 to the DAT machine).
For further details about this setting, see “Syncing
AES/EBU devices” on page 30.
ADAT optical A / B
The ADAT optical clock source settings (ADAT
Optical A and ADAT Optical B) refer to the clock
provided by the 896mk3’s two optical inputs, when
either one is connected to another optical device.
These two settings only appear in the Master Clock
Source menu when their corresponding optical
bank input is enabled and set to the ADAT Optical
format, as explained in “Optical input/output” on
page 44.
This setting can be used to resolve the 896mk3
directly to the optical input connection. Most of
the time, you can set up a better operating scenario
that uses one of the other synchronization options.
However, there may be occasions when you have an
optical device that has no way of synchronizing
digitally to the 896mk3 or an external
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