M O T U F I R E W I R E A U D I O C O N S O L E
38
You should also use this setting if you have a MIDI
Timepiece AV, which allows you to drive your
entire system from the transport controls of your
audio software.
You could also use ADAT sync to continuously
resolve the 896HD to SMPTE time code, video,
and word clock via a synchronizer like the MOTU
MIDI Timepiece AV. Word clock can accomplish
the same thing.
For further details, see “Sample-accurate ADAT
sync” on page 24, “Sample-accurate ADAT sync
with no synchronizer” on page 25 and “Syncing to
video and/or SMPTE time code” on page 26.
ADAT optical
The
ADAT optical
clock source setting refers to the
clock provided by the 896HD’s optical input, when
it is connected to an ADAT optical device. This
setting can be used to slave the 896HD directly to
the optical input connection. Most of the time, you
can set up a better operating scenario that uses one
of the other synchronization options. However,
there may be occasions when you have an ADAT
optical compatible device that has no way of
synchronizing digitally to the 896HD or an
external synchronizer such as the Digital
Timepiece. In this case, the
ADAT Optical
clock
source setting lets you slave the 896HD to the
device itself via its digital input to the 896HD.
If the
ADAT Optical
setting does not appear in the
Clock Source menu, it means that the 896HD’s
optical input is currently turned off. Choose the
ADAT optical
format from the Optical input menu
(Figure 5-1 on page 36).
This setting is also useful if you just need to make a
simple, click-free digital transfer between the
896HD and another device — where a time code
reference and shared transport control are not
needed — without having to set up an elaborate
synchronization scenario.
For further details about this setting, see “Syncing
optical devices” on page 27.
Other audio interfaces
You may see other audio interfaces in the Clock
Source list, such as another MOTU FireWire
interface, a MOTU PCI-324 or PCI-424 system, the
Macintosh built-in audio, or perhaps even another
third-party audio interface. The 896HD can
resolve to these other 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.
Samples Per Buffer
The
Samples Per Buffer
setting lets you reduce the
delay you hear when patching live audio through
your audio software. For example, you might have
a live microphone input that you would like to run
through a reverb plug-in that you are running in
your host audio software. When doing so, you may
hear or feel some “sponginess” (delay) between the
source and the processed signal. If so, don’t worry.
This effect only affects what you hear: it is not
present in what is actually recorded.
You can use
Samples Per Buffer
setting to reduce
this monitoring delay—and even make it
completely inaudible.
☛
If you don’t need to process an incoming live
signal with software plug-ins, you can monitor the
signal with no delay at all using CueMix Console,
which routes the signal directly to your speakers
via hardware. For details, see chapter 9, “CueMix
Console” (page 65).
Adjusting the
Samples Per Buffer
setting impacts
the following things:
Summary of Contents for 896HD
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