MOTU 828mkII User Manual page 49

For further details about this setting, see "Syncing
S/PDIF devices" on page 30.
Word Clock In
The Word Clock In setting refers to the Word Clock
In BNC connector on the 828mkII rear panel.
Choosing this setting allows the 828mkII to slave to
an external word clock source, such as the word
clock output from a digital mixer.
ADAT 9-pin
The ADAT 9-pin clock source setting refers to the
ADAT digital audio synchronization format. It
allows the 828mkII to slave to an ADAT — or
ADAT sync chain — via its ADAT sync 9-pin
connector. ADAT sync also carries precise, sample
location information, which allows AudioDesk and
Digital Performer to transfer audio to and from
ADATs without drifting by as much as one sample.
Use this setting when you are using the 828mkII
with one or more ADATs. Make sure the 828mkII is
connected to the end of the ADAT sync chain.
You should also use this setting if you have a MIDI
Timepiece AV, which allows you to drive your
entire system from the transport controls of
AudioDesk, Digital Performer or other software.
You could also use ADAT sync to continuously
resolve the 828mkII to SMPTE time code, video,
and word clock via a synchronizer like the MOTU
MIDI Timepiece AV. Word clock can accomplish
the same thing.
For further details, see "Sample-accurate ADAT
sync" on page 25, "Sample-accurate ADAT sync
with no synchronizer" on page 26 and "Syncing to
video and/or SMPTE time code using a
synchronizer" on page 28.
ADAT optical
The ADAT optical clock source setting refers to the
clock provided by the 828mkII's optical input,
when it is connected to an ADAT optical device.
M O T U F I R E W I R E C O N T R O L P A N E L ( M A C O S 9 )
This setting can be used to slave the 828mkII
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
ADAT optical compatible device that has no way of
synchronizing digitally to the 828mkII or an
external synchronizer such as the Digital
Timepiece. In this case, the ADAT Optical clock
source setting lets you slave the 828mkII to the
device itself via its digital input to the 828mkII.
If the ADAT Optical setting does not appear in the
menu, it means that the 828mkII's optical input is
currently either turned off or set to the TOSLink
format. In either case, choose the ADAT optical
format from the Optical input menu (Figure 6-1 on
page 48).
This setting is also useful if you just need to make a
simple, click-free digital transfer between the
828mkII and another device — where a time code
reference and shared transport control are not
needed — without having to set up an elaborate
synchronization scenario.
For further details about this setting, see "Syncing
optical devices" on page 29.
TOSLink
The TOSLink clock source setting refers to the
clock provided an optical S/PDIF device connected
to the 828mkII's optical input. This setting can be
used to slave the 828mkII 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 TOSLink-
compatible device that has no way of
synchronizing digitally to the 828mkII or an
external synchronizer such as the Digital
Timepiece. In this case, the TOSLink clock source
setting lets you slave the 828mkII to the other
device via the 828mkII's optical input.
49