Mbox 2 Pro Getting Started44
Word Clock
Mbox 2 Pro provides Word Clock In and Out
connectors on the back panel that let you syn-
chronize, or “clock” Pro Tools LE and
Mbox 2 Pro to industry standard Word clock.
Word clock is used to synchronize a wide range
of devices such as non-linear video systems and
other types of equipment typically found in pro-
fessional audio facilities.
With both Word clock input and output, your
Mbox 2 Pro-equipped Pro Tools LE system can
act as Word clock “slave” or “master.”
To connect Word clock to Mbox 2 Pro:
Using high-quality, 75 ohm BNC cables (not
included) connect the Mbox 2 Pro Word Clock
In and Out connectors to the appropriate ports
on the other Word clock-capable devices in your
studio.
Using Word Clock with
Pro Tools LE
Pro Tools LE with Mbox 2 Pro can act as Word
clock master, or as a slave to Word clock sup-
plied by an external device.
Pro Tools LE as Word Clock Master
Mbox 2 Pro Word clock output is always active,
letting Pro Tools supply Word clock to any con-
nected devices that support standard Word
clock.
To use Pro Tools LE as Word clock master:
1 Make sure all connections are correct between
Mbox 2 Pro and your external devices.
2 Configure all external devices to slave to the
Word clock coming from Mbox 2 Pro. (Be sure to
verify sample rate settings, termination require-
ments and other internal settings for the device;
refer to the manufacturer’s documentation if
you need more information on the particular re-
quirements for your other equipment.)
3 Launch Pro Tools.
4 Choose Hardware > Setup.
5 Click the Clock Source pop-up menu and
choose Internal.
Do not confuse Word clock and other forms
of “clock reference” with time code and
other forms of “positional reference.” For an
overview of synchronization terminology
and concepts, see the
Pro Tools Reference
guide.
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