MOTU 896mk3, Руководство пользователя

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I N S T A L L I N G T H E 8 9 6 M K 3 H A R D W A R E
30
There are two ways to synchronize the 896mk3
with other devices, as discussed in the following
sections: via the driver or via word clock.
Resolving to other Core audio drivers
The MOTU FireWire driver has the ability to
resolve to other Core Audio drivers. This allows the
896mk3, and other MOTU FireWire interfaces, to
resolve to other audio interfaces running simulta-
neously on the same computer, such as the Mac’s
built-in audio, a PCI-424 core system, or even
3rd-party interfaces, without the need for external
word clock connections between the devices.
Doing so ensures that audio tracks being played or
recorded by your MOTU FireWire interface will
not drift apart from tracks on the other device
during long playback or recording passes.
To synchronize multiple devices via the MOTU
FireWire driver, choose one device (PCI, FireWire
or otherwise) as the master clock and then slave the
896mk3 and other FireWire devices to it. All
interfaces will remain resolved to each other via the
master interface.
Make the Clock Source settings for each interface
as follows:
■
For the master interface, click its tab in the
FireWire Console and choose any clock source you
wish (except any of the slave interfaces, of course).
■
For each slave interface, click its tab and choose
the master interface from the Clock Source menu, as
demonstrated below in Figure 3-21. This causes
the slave interfaces to resolve to the master
interface.
Figure 3-21: To resolve a MOTU FireWire interface to another Core
Audio device, choose the other device from the Clock Source menu in
the MOTU FireWire Audio Console. In this example, the 828mk3 will
slave to the 896mk3.
If you have multiple 896mk3s, choose one as the
master, and set its Clock Source to
Internal . Then,
click the tab of the other 896mk3s and set their
Clock Source to the first 896mk3.
Resolving to word clock
To resolve two 896mk3 FireWire interfaces with
each other via word clock, choose one as the word
clock master and then slave the second interface to
the first, as shown in Figure 3-19 on page 29. For
three interfaces, you can probably get away with
daisy-chaining them via their word clock
connectors, but this may not always produce the
most reliable results. For three or more devices, a
word clock distribution device is highly
recommended. In this case, the distribution box is
the master, and all FireWire interfaces slave directly
to it (instead of to each other).
Connecting other MOTU FireWire interfaces
You can add an original MOTU 828 to the end of a
FireWire daisy chain (because the 828 has only one
FireWire port), or you can mix and match multiple
896mk3s with other MOTU FireWire interfaces
using a standard FireWire hub. You can also add