MOTU 828x 28x30 Audio Interface with ThunderTechnology - Manual (Page 12)

A B O U T T H E 8 2 8 X
12
THE 828X REAR PANEL
The 828x rear panel has the following connectors:
■
Eight balanced quarter-inch (TRS) analog
outputs (with 24-bit 192 kHz converters)
■
Eight balanced quarter-inch (TRS) analog
inputs (with 24-bit 192 kHz converters)
■ Two XLR “main” analog outputs with 24-bit
192 kHz converters
■
Two balanced quarter-inch (TRS) analog sends
(for the front-panel mic/guitar inputs)
■
Balanced TRS quarter-inch analog in/out
dedicated for SMPTE time code
■
Two sets of optical connectors (in and out),
individually switchable among ADAT optical
“lightpipe”, 96 kHz S/MUX optical or S/PDIF
“TOSLink”
■
RCA S/PDIF in/out
■ MIDI IN and MIDI OUT
■
Word clock in/out
■
Foot pedal jack
■ One Thunderbolt connector
■
One high-speed USB2 connector
28 inputs and 30 outputs
All 828x inputs and outputs can be used simulta-
neously, for a total of 28 inputs and 30 outputs
when operating at 44.1 or 48 kHz:
* The phone jack next to the MAIN VOL knob is
hard-wired to (mirrors) the XLR main outs. The
PHONES output can operate as an independent
output pair, or it can mirror any other 828x output
pair, such as the main outs.
† The 828x optical connectors support several
standard optical I/O formats, which provide
varying channel counts. See “Optical” on page 13
for details about optical bank operation.
With the exception of the phone jack on the front
panel labeled “(MAIN)”, all inputs and outputs are
discrete. For example, using a mic input does not
“steal” an input from the TRS analog I/O bank.
Analog
All analog inputs are equipped with 24-bit 192 kHz
A/D converters. All analog outputs have 24-bit
192 kHz D/A converters. All audio is transferred to
and from the computer in a 24-bit data stream.
All quarter-inch analog inputs can accept either a
balanced or unbalanced plug.
Connection Input Output
Analog 24-bit 192 kHz on bal/unbal TRS 8 8
Mic/guitar 24-bit 192 kHz on XLR/TRS combo 2 -
Main outputs 24-bit 192 kHz on XLR - stereo
Headphone output* - stereo
ADAT optical digital† 16 16
RCA S/PDIF 24-bit 96kHz digital stereo stereo
Total 28 30