MOTU 896HD User's Guide download pdf (Page 30)

INSTALLING THE 896HD HARDWARE

this causes problems. Instead, use a dedicated

synchronizer like the Digital Timepiece or a word

clock distribution device of some kind.

Slaving to a 2x and 1/2x word clock

The 896HD has the ability to slave to a word clock

signal running at either twice or half their current

clock rate. For example, the 896HD could be

running at 96 kHz while slaving to a 48 kHz word

clock signal from a MOTU Digital Timepiece.

Similarly, the 896HD could run at 88.2 kHz and

slave to 44.1 kHz word clock. Conversely, the

896HD could run at 48 kHz and slave to a 96 kHz

word clock signal. In all of these cases, the front

panel clock LEDs ﬂash both sample rates to

indicate that the 896HD is slaving to word clock at

either twice or half its own clock rate. But if the

896HD is running at 96 kHz, it cannot slave to

word clock running at 44.1 kHz.

Remember, the word clock signal must be one of

the following:

■ the same as the 896HD clock

■ twice the 896HD clock

■ half of the 896HD clock

Forcing a 1x word out rate

The 896HD can generate a word clock output

signal that either matches the current system clock

rate (any rate between 44.1 and 192kHz) or the

corresponding 1x rate. For example, if the 896HD

is operating at 192kHz, you can choose to generate

a word out rate of 48kHz. For details on how to

make this word clock output setting, see “Word

Out” on page 43.

SYNCING LARGE SYSTEMS

If you are connecting the 896HD to a lot of other

digital audio gear, get a Digital Timepiece. It can

synchronize a wide variety of devices, and it offers

sample accurate synchronization for devices that

support it, such as ADATs. You will also be able to

control everything from the transport controls of

your audio software. If you have even more devices

than a single Digital Timepiece can support,

consider a word clock distribution device, such as

the Aardvark Aard Sync™ video-to-word clock

converter. Products like this offer multiple word

clock outputs and an extremely low-jitter clock.

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MOTU 896HD User's Guide Page 30

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