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. Layla24 can

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

Layla24 to slave to an ADAT clock, just set Layla24’s input clock to the

ADAT

setting. Layla24 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 Layla24’s converters it is best

to use Layla24’s

Internal

input clock setting instead of synchronizing to an

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

MIDI Time Code (MTC)

– MIDI time code differs from the preceding

synchronization methods. Instead of simply providing the rate at which

things should proceed, it transfers information in an elapsed time format

(HH:MM:SS.) In addition, MTC also transmits a frame number to give the

fine definition that is needed. This longitudinal format has the benefit of

including positional information; however, over time it tends not to

maintain as tight a sync as sample based synchronization techniques.

Esync

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

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

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

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

output connectors. Layla24 is always outputting Esync clock. For more

information please read step 6 in the section entitled “

Installing the

Layla24 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 Layla24 is the only audio device used in

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

select

Internal

for Layla24’s input clock. Layla24 will then use its own

clock to control its operation.