Synchronization - MOTU 1248 User Manual

Legend
Talkback Talkback
section
Figure 4-17: Mixer setup for the talkback mic.
Talkback settings
The talkback settings (Figure 4-17) can be
accessed by enabling the Legend in the Controls
panel of the mixer.
Talk
Press and hold the Talk button (Figure 4-17) to
engage the talkback mic.
Sticky
When Sticky is engaged (Figure 4-17), the Talk
button remains engaged when you click it, until
you click it again to disengage, so you don't have to
hold it down while speaking.
Dim
If you are feeding a monitor mix to the musicians
on the same Aux bus as your talkback mic, use the
Dim knob (Figure 4-17) to control how much the
monitor mix will be attenuated when talkback is
engaged. This gives you control over the relative
volume between the talkback mic signal and all
other audio on the mix bus. To control overall
volume of everything, use the bus fader.
58
Talkback Talkback
settings source

SYNCHRONIZATION

If you connect devices digitally to your MOTU
device, or if you need to synchronize your MOTU
device with an outside time reference such as word
clock, you must pay careful attention to the
synchronization connections and clock source
issues discussed in the next few sections.
Do you need to sync?
If you will be using only your MOTU device's
analog inputs and outputs (and none of its digital
I/O), and you don't need to resolve your system to
external word clock, you don't need to make any
sync connections. You can skip this section.
Situations that require synchronization
output
There are two general cases in which you will need
to resolve you MOTU device with other devices:
Synchronizing with other digital audio devices
■
so that their digital audio clocks are phase-locked
(as shown in Figure 4-18)
Resolving your MOTU device to an external
■
clock source
Networking multiple MOTU AVB interfaces
■
together
Synchronization is critical for clean digital I/O
Synchronization is critical in any audio system, but
it is especially important when you are transferring
audio between digital audio devices. Your success
in using the digital I/O features on your MOTU
device depends almost entirely on proper synchro-
nization. The following sections guide you through
several recommended scenarios.
Be sure to choose a digital audio clock master
When you transfer digital audio between two
devices, their audio clocks must be in phase with
one another — or phase-locked. Otherwise, you'll
hear clicks, pops, and distortion in the audio — or
perhaps no audio at all.
H A R D W A R E I N S T A L L A T I O N