M O T U A U D I O S E T U P
39
audio devices via their CoreAudio driver. This
allows you to play and record audio with your host
audio software via both interfaces at the same time
without their audio streams drifting apart from
one another over long recording or playback
passes. No external synchronization connections
are required for this setting, as the two devices are
entirely resolved via the software driver.
Default Stereo Input/Output
In the System Preferences window, Mac OS X lets
you choose third-party hardware such as the
896mk3 for your Mac sound input and output. The
system input and output can be used for alert
sounds and general audio I/O for applications like
iTunes, iMovie, etc.
Figure 5-2: The Mac OS X sound preferences let you use the 896mk3
for general stereo audio input and output for your Mac.
The
Default Stereo Input
and
Default Stereo Output
settings in MOTU Audio Setup (Figure 5-1 on
page 36) let you specify the stereo input and output
on the 896mk3 to be used when it is chosen as the
audio I/O device in the system preferences.
Phones
The
Phones
setting lets you choose what you will
hear from the headphone jack. Choose
Main Outs
if you’d like to route the Main Out stereo pair to the
PHONES jack. 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 FX mix busses.
Optical input/output
The
Optical input
and
Optical output
settings let
you choose between ADAT optical (‘lightpipe’) and
S/PDIF optical (‘TOSLINK’) as the format for the
896mk3’s two banks of optical input and output
(Bank A and Bank B). Choose the format that
matches the device connected. If you are not using
the optical connections, it is recommended that
you turn them off (by choosing
Disabled
from the
menu) to reduce bandwidth and processing
overhead. Note that you can operate each optical
port independently. For example, you could use the
ADAT optical format on the Bank A input (with a
digital mixer, for example) and optical S/PDIF on
the Bank A output (with a DAT deck, for example).
Main Out Assign
Choose
Main Outs
from the
Main Out Assign
menu
to treat the Main Outs as their own independent
output pair. Choose any other output pair to cause
the MAIN OUT jacks to mirror (duplicate) the
output pair you choose.
Return Assign
The
Return Assign
menu lets you choose any pair of
896mk3 audio outputs. The audio signal from this
output pair is then sent back to the computer via
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