User guide

Chapter 4: Making Studio Connections 23
MIDI Connections
Two MIDI ports become available when you
connect the provided breakout cable into the
Word Clock, MIDI, and S/PDIF input on the
back panel of the Mbox Pro. See “Word Clock,
MIDI, S/PDIF Connector” on page 9.
If you need additional MIDI ports you can add a
compatible MIDI interface. USB MIDI interfaces
work effectively with Pro Tools systems on Win-
dows or Mac.
To connect MIDI devices to Mbox Pro:
1 Using the included breakout cable, connect it
to the Word Clock, MIDI, and S/PDIF input on
the back panel of the Mbox Pro.
2 Connect the MIDI OUT of your MIDI device
or controller to the MIDI IN port on the break-
out cable.
3 Connect the MIDI IN of your MIDI device or
controller to the MIDI OUT port on the break-
out cable.
Word Clock
Mbox Pro provides Word Clock In and Out con-
nectors on the back panel that let you synchro-
nize, or “clock” Mbox 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 professional audio facilities.
With both Word clock input and output, your
Mbox Pro-equipped system can act as Word
clock “slave” or “master.”
To connect Word clock to Mbox Pro:
 Using high-quality, 75 ohm BNC cables (not
included) connect the Mbox 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
Pro Tools with Mbox Pro can act as Word clock
master, or as a slave to Word clock supplied by
an external device.
On Mac OS X, use the Audio Midi Setup
(AMS) utility to customize the names of your
MIDI devices.
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.
Mbox Pro can synchronize to Word clock at
44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, and 192 kHz sample rates.
When using third-party applications, you
can configure the Clock Source for Mbox Pro
using the Control Panel. See “Clock Source”
on page 27.