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OPERATION OVERVIEW
Function
BLACK BOOT
Note: For an overview of the USB/Audio interface components and connections, refer to
Audio Interface"
on page 10.
The Mbox 2016 Dual Output server hardware includes a Focusrite Scarlett 2i2 USB/Audio interface. This device is
LEFT
A
located in Mbox rack immediately above the Sonnet xMac unit. The audio interface provides two channels of audio
input and two channels of audio output. The standard connector for both input and output is 3pin XLR, and the inputs
will also accept a 1/4" TRS plug.
For use with the Mbox application, the inputs on the audio interface are typically used for timecode input using SMPTE
LTC timecode. The outputs are typically used for playout of audio from the Mbox application.
Note: The standard audio interface only supports two-channel (stereo) audio output. If more than two channels of audio
output are required, an alternate audio interface device should be used.
1
0
GAIN
scarlett 2i2
LINE INST
Audio Input
XLR (1 & 2)
The Focusrite Scarlett 2i2 audio interface has a USB indicator LED that shows when the device has a USB connection to
the Mac Pro computer. This connection is required for any audio input or output using the device.
Input
Audio input for the Mbox 2016 Dual Output server is typically only a single channel. This single channel of input audio is
in the form of Linear Time Code (LTC) which is often called SMPTE timecode. LTC is usually a balanced line-level signal,
but the audio interface will also accept an unbalanced and/or instrument-level input.
For audio input into Mbox, the audio source and input channel must be selected on the application's Preferences tab.
With the standard audio interface, the source selection would be "Scarlett 2i2 USB". It does not matter which input
channel (1 or 2, left or right) is used for LTC input. But depending on which input channel is receiving the signal, this
active channel must be selected. Refer to "Audio Input" on page 102 of the Mbox software user manual for information
on configuring the Mbox application for audio input.
The Scarlett 2i2 interface has several adjustments that can be made to affect the input signal:
+
Input Gain - The colored LED ring around the knob will be colored green if signal is at a good level, red if the signal is
too high. Start with the knob at 12 o'clock and adjust gain if signal drops out intermittently.
+
Line/Inst - For standard LTC, this switch should be to the left, in the Line position.
+
48v - This button should be in the off position (red LED off)
+
Direct Monitor - If only using the audio input, the position of this switch doesn't matter. But if using both the audio
input and output, this switch should be in the Off position.
MBOX® 2016 DUAL OUTPUT HARDWARE MANUAL
32
LINE OUT P UT S
R IG HT
LE F T
USB
"A-A"
SECTION
BACK VIEW
RED BOOT
RIGHT
Input Gain
48v
Headphones
2
MONITOR
10
0
10
48V
0
GAIN
DIRECT
MONITOR
LINE INST OFF ON
Line/Inst
Monitor
Direct
USB
Monitor
LED
A
L
R
TOP VIEW
LE F T
R IG HT
10
B ALANC E D
AUDIO OUT
FRONT VIEW
Audio Output
XLRs (L & R)
"Focusrite Scarlett 2i2 USB/
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