User Manual

HARDWARE INSTALLATION
50
2 In the device list (item #1 on page 12), choose
the MOTU interface you wish to use as the clock
master.
3 Click the Become Clock Master button below
the Clock Mode menu.
Now, all other MOTU devices on the network are
resolved to this device.
Figure 5-23: Choosing a clock master.
Alternately, you can go to the clock mode menu
for each individual device separately and choose
the master clock device by hand. For example, you
may be in a situation where at least one MOTU
device on the network must remain resolved to its
own clock (or another clock source). Just know
that in this case, audio cannot be streamed
between MOTU devices that don’t share the same
master clock.
Resolving the master clock device to an external
clock source
The MOTU device you’ve specified as the AVB
network clock master can itself be resolved to an
external time base such as word clock (if available)
or optical. Just choose the desired clock source
from its Clock Mode menu (in the Device tab).
Doing so effectively resolves the entire AVB
network to the external clock source.
SYNCING MULTIPLE AVB AUDIO INTERFACES
CONNECTED TO A MAC
There are several options for clocking multiple
AVB audio devices connected to the Mac:
■ You can resolve them to an external clock
source (like word clock, if available).
■ You can create an aggregate device, as usual.
The aggregate device setup panel has a check box
called Drift Correction, which sample-rate
converts devices that are not synchronized.