User guide

Avid Mbox Pro User Guide20
2 Connect the dual TS connectors (the “Y” end of
the cable) to the external processor as follows:
• Connect the TS connector that corresponds to
the tip (send) on the TRS connector to the in-
put of the processor.
• Connect the other TS connector that corre-
sponds to the ring (return) on the TRS con-
nector to the output of the processor.
Connecting Digital I/O
Mbox Pro provides digital inputs and outputs for
S/PDIF-format digital audio. S/PDIF digital I/O
can be used in combination with analog I/O, and
are independently routable.
Connecting Digital Devices
To connect Mbox Pro to an external digital device:
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 Using RCA (coaxial) cables, connect the
Mbox Pro S/PDIF In to the S/PDIF output of
the device.
3 Connect the Mbox Pro S/PDIF Out to the
S/PDIF input of the external device.
4 Be sure to read the next section for important in-
formation.
Using S/PDIF Input
If you are using Pro Tools, use the Hardware Setup
dialog in Pro Tools.
If you are using the S/PDIF input on Mbox with a
third-party CoreAudio-or ASIO-compliant appli-
cation, use the Mbox Control Panel to configure
the input. See “General Setup” on page 26.
Insert cable
Word Clock, MIDI, and S/PDIF input on Mbox Pro
Dual TS
connector
Single TRS
connector
Multi-pin port for breakout cable input
Use 75 ohm RCA cables (the standard for
digital audio) as other cables (such as home
stereo cables) may have problems.
Mbox Pro supports external sync at sample
rates of up to 192 kHz.
S/PDIF inputs on Mbox Pro can sync to an
external Word clock. See “Word Clock” on
page 22 for configuration information.