User`s guide

INSTALLING THE TRAVELER HARDWARE
36
SYNCING WORD CLOCK DEVICES
The Traveler word clock connectors allow you to
synchronize it with a wide variety of other word
clock-equipped devices.
For standard word clock sync, you need to choose
an audio clock master (as explained in “Be sure to
choose a digital audio clock master” on page 27).
In the simplest case, you have two devices and one
is the word clock master and the other is the slave
as shown below in Figure 4-19 and Figure 4-20.
Figure 4-19: Slaving another digital audio device to the Traveler via
word clock. For the Traveler clock source, choose any source besides
word clock, as it is not advisable to chain word clock.
Figure 4-20: Slaving the Traveler to word clock. For the Traveler clock
source, choose ‘Word Clock In’.
Don’t chain word clock
If you have three or more digital audio devices that
you need to synchronize, avoid chaining their word
clock connections (OUT to IN, OUT to IN, etc.), as
this causes problems. Instead, use a dedicated
synchronizer like the Digital Timepiece or a word
clock distribution device of some kind.
Slaving to 2x and 1/2x word clock
All MOTU FireWire audio interfaces that support
96 and 192 kHz operation (including the 896HD)
have the ability to slave to a word clock signal
running at the 1x sample rate that corresponds to
their current clock rate. For example, the Traveler
could be running at 192 kHz while slaving to a
48 kHz word clock signal from a MOTU MIDI
Timepiece AV. Similarly, the Traveler could run at
88.2 kHz and slave to 44.1 kHz word clock. In all of
these cases, the front panel clock LEDs flash both
sample rates to indicate that the Traveler is slaving
to word clock at the corresponding 1x clock rate.
But if the Traveler is running at 96 kHz, it cannot
slave to word clock running at 44.1 kHz.
SYNCING LARGE SYSTEMS
If you are connecting the Traveler to a lot of other
digital audio gear, get a word clock distribution
device, which offers multiple word clock outputs.
Master
Slave
Word clock OUT
Word clock IN
Other device
Trav eler
Audio
clock
Master
Slave
MOTU Digital Timepiece universal synchronizer
Word clock OUT
Word clock IN
Trav eler
!Traveler Manual/Win Page 36 Monday, November 29, 2004 3:50 PM