MOTU 896HD, User Manual

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A B O U T T H E 8 9 6 H D
10
■
Two XLR main analog outputs with volume
knob (on the front panel)
■
One 9-pin ADAT SYNC IN connector
■
BNC word clock input and output
■
Two 1394 FireWire jacks
18 inputs and 22 outputs
All 896HD inputs and outputs can be used simulta-
neously, for a total of 18 inputs and 22 outputs at
44.1/48kHz:
All inputs and outputs are discrete. In other words,
using the main outs does not “steal” an output pair
from the bank of eight XLR analog outputs. The
same is true for the headphone outs.
The ADAT optical ports provide 4 channels of I/O
at 88.2 or 96kHz. They are disabled at the 4x
sample rates (176.4 and 192kHz).
The headphone output can operate as an
independent output pair, or it can mirror any other
896HD output pair, such as the main outs.
Analog
All 10 analog inputs are equipped with 24-bit
192kHz, 64x oversampling A/D converters. All 12
analog outputs have 24-bit 128x oversampling D/A
converters. All audio is carried to the computer in a
24-bit data stream. Each output can be individually
switched between 4 or -10dB operation.
Each input can be individually set to one of three
input levels: MIC (feeds the mic preamp and
includes front-panel trim and switchable 48V
phantom power), LINE (for -10dB inputs with
front-panel trim) and +4/FIXED (for +4 “hot”
inputs for which no gain adjustment in the 896HD
is desired).
Mic preamps
All eight analog inputs are equipped with a mic
preamp on a Neutrik™ combo-style connector that
accepts either an XLR or quarter-inch plug.
Defeatable 48V phantom power is supplied by a
front panel switch. In addition, each input has its
own trim knob, which provides a trim range of
approximately 40dB.
Main Outs
The main outs are equipped with 24-bit 192kHz
128x oversampling D/A converters and serve as
independent outputs for the computer or for the
896HD’s on-board CueMix DSP mixes. The main
out volume can be controlled with the front panel
volume knob (when the switch is in the
Main Outs
+ Phones position).
Optical
The 896HD optical jacks support the industry
standard ADAT optical format, which provides
eight channels of 24-bit digital audio at either 44.1
or 48 kHz, and four channels at 88.2 or 96kHz.
AES/EBU with sample rate conversion
The 896HD rear panel provides a standard AES/
EBU digital input and output that supports digital
I/O at 44.1, 48, 88.2 and 96 kHz. In addition, input
or output can be sample-rate converted to any of
these sample rates in situations that call for a
different rate than the 896HD’s global sample rate.
The AES/EBU jacks are disabled at the 4x sample
rates (176.4 and 192kHz).
ADAT sync: sample-accurate synchronization
The 896HD’s standard 9-pin ADAT SYNC IN
connector provides sample-accurate synchroni-
zation with all Alesis ADAT tape decks connected
Connection Input Output
24-bit 192kHz XLR analog 8 8
24-bit 192kHz XLR main outputs - stereo
Headphone output - stereo
ADAT optical digital (at 44.1 or 48kHz) 8 8
AES/EBU 24-bit 96kHz digital stereo stereo
Total 18 22