Multichannel Wave Synchronization; 896Hd Tab Settings; Optical Input/Output; Phones - MOTU 896HD User Manual

Multichannel Wave synchronization

This option should always be left on (checked).
There are only a few rare cases in which you would
want to turn it off. For details, refer to the MOTU
tech support database at www.motu.com.

896HD TAB SETTINGS

Optical input/output

The Optical input and Optical output settings let
you choose between ADAT ('lightpipe') or OFF.
Turning it off frees up FireWire bandwidth. In
other words, it opens up resources on the FireWire
bus for other devices connected via FireWire.

Phones

The Phones setting lets you choose what you will
hear from the headphone jack. Choose Main Outs
if you'd like the headphone output to match the
main outs. Choose Phones if you would like the
headphones to serve as their own independent
output, which you can access as an independent
output destination in your host audio software and
as an output destination for the four on-board
CueMix DSP mix busses.
At the 4x sample rates (176.4 and 192kHz), the
headphone output can be assigned to any analog
output pair or the Phones setting, as described
above. But at the 4x sample rates, the Phones
output is not available as an output destination for
software on the computer. Instead, it is only
available as a destination for the two CueMix DSP
mixes. In other words, it can only take CueMix
inputs.

Sample Rate Conversion

This option lets you control AES/EBU sample rate
conversion. Sample rate conversion is available
when the 896HD is operating at the 1x sample rates
(44.1 and 48kHz) or the 2x sample rates (88.2 or
96kHz). AES/EBU is disabled entirely at the 4x
samples rates (176.4 and 192kHz). Each option is
explained below.
40
None
No sample rate conversion occurs. Both the AES/
EBU input and output match the sample rate of the
896HD's system clock.
AES In
The AES/EBU input locks to the sample rate of the
input signal (whatever it happens to be) and
converts it to the 896HD system clock rate. The
Rate Conversion LEDs on the 896HD front panel
indicate the incoming sample rate and that rate
conversion is occurring.
AES Out slave to AES in
To make the AES/EBU output sample rate match
the sample rate currently being received by the
896HD's AES/EBU input, choose AES Out slave to
AES in. This setting requires a connection to the
896HD's AES/EBU input from a device that is
transmitting an AES/EBU clock signal.
☛
Be careful when both the 896HD's AES/EBU
input and output are connected to the same
external device: this option is likely to create a
clock loop.
☛
When you are using the AES/EBU input as a
clock source for sample rate conversion on the
AES/EBU output, you cannot use the AES/EBU
input for audio input.
AES Out x 2 / AES Out ÷ 2
Choose one of these sample rates when the desired
AES/EBU output rate needs to be twice the 896HD
system clock rate (when the system clock is at
either 44.1 or 48 kHz) or half the system clock rate
(when the system clock is at 88.2 or 96 kHz). Either
way, the AES/EBU output remains resolved to the
896HD system clock. For further details about this
option, see "Syncing AES/EBU devices" on
page 28.
M O T U F I R E W I R E A U D I O C O N S O L E