Owner`s manual

ADAT

– The Alesis ADAT optical interface can send and receive up to 8

simultaneous channels of digital audio data over fiber optic cables. Unlike

wire cables, fiber optic cables do not add noise or interference. Mona can

send out (or “master”) ADAT clock as well as slave to it. If you want Mona

to slave to an ADAT clock, just set Mona’s input clock to the

ADAT

setting. Mona can only sync to ADAT clock if the master device is set to a

sample rate between 40kHz and 50kHz. Otherwise you will get noise

and/or loss of sync.

Note:

To preserve the high audio quality of Mona’s converters it is best to

use Mona’s

Internal

input clock setting instead of synchronizing to an

external ADAT clock, which may add unwanted jitter to the signal.

Esync

– Esync is a proprietary form of super clock that is used to

synchronize two or more Echo 24-bit products like Mona, Layla24, Gina24,

and Darla24. While Gina24 and Darla24 have both input and output

connectors on their PCI cards, Mona and Layla24 only have the Esync

output connectors. Mona is always outputting Esync clock. For more

information please read step 6 in the section entitled “

Installing the Mona

Hardware

” in this manual.

Now let’s take a look at some possible configurations and how you might

set them up from a synchronization standpoint.

Let’s start simple. Suppose that Mona is the only audio device used in your

system. Since you have no other devices to synchronize with, simply select

Internal

for Mona’s input clock. Mona will then use its own clock to

control its operation.

Now a little more complicated set-up: You have two Monas connected.

Simply set Mona #1 to

Internal

for its input clock. Now connect the first

Mona to the second one via a BNC cable running from Word Clock Out on

Mona #1 to Word Clock In on Mona #2. Now select

Word

for Mona #2’s

input sync. The second Mona will slave to the first one and your Monas will

now operate in unison.

No matter how many devices you are synchronizing, the concept is

essentially the same. You are merely “daisy-chaining” devices together