DigiDesign ADAT Bridge I/O User's Guide download pdf (Page 12)

ADAT Bridge I/O

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you can easily correct it by resetting the ap-

propriate parameter.

Internal

When lit, this LED indicates that

the ADAT Bridge I/O sample clock refer-

ence is its own internal clock. The internal

clock frequency is determined by the Sam-

ple Rate setting in the Pro Tools Hardware

dialog or Session Setup window. Internal

sync mode is used whenever the ADAT

Bridge I/O’s sample rate clock is not being

determined by an external source such as

an ADAT, DAT machine, or synchroniza-

tion peripheral.

ADAT

When continuously lit, the ADAT

Bridge I/O sample rate is being slaved to an

ADAT (the ADAT Bridge I/O is using the

ADAT as its master clock reference). This

parameter is set by choosing ADAT Optical

in the Sync Mode pop-up in the Pro Tools

Hardware dialog or Session Setup window.

If this LED is flashing, it indicates that the

ADAT Bridge I/O is either not receiving a

signal from the ADAT or that the signal is

invalid for some reason.

Digital

When continuously lit, the ADAT

Bridge I/O is being slaved to an external

AES/EBU or S/PDIF signal (the ADAT Bridge

I/O is using the signal as its master clock

reference). This parameter is set by choos-

ing Digital in the Sync Mode pop-up in the

Pro Tools Hardware dialog or Session Setup

window. This is the setting typically used

for transferring material from DAT ma-

chines or other digital devices into

Pro Tools. If this LED is flashing, it indi-

cates that the ADAT Bridge I/O is either not

receiving an AES/EBU or S/PDIF signal or

that the signal is invalid for some reason.

(This could occur if, for example, you have

chosen AES/EBU as your digital format in

the Pro Tools Hardware dialog or Session

Setup window and are actually receiving a

signal via the S/PDIF port.)

Slave

When continuously lit, this LED in-

dicates that the ADAT Bridge I/O master

sample clock reference is being determined

by an external device connected to the

Slave Clock In port on the ADAT Bridge

I/O’s rear panel—typically another Digide-

sign Audio Interface or a synchronization

peripheral such as the Universal Slave

Driver. The ADAT Bridge I/O will automat-

ically switch to Slave mode when a valid

slave clock signal is connected to its Slave

Clock Input port and the ADAT Bridge I/O

is set for internal sync in the Pro Tools

Hardware Setup dialog or Session Setup

window.

3. Channel 1-2 Input

This LED indicates the source of input to

Pro Tools for channels 1-2 of Group A

and/or Group B. When the ADAT LED is lit,

input channels 1-2 in Pro Tools are cur-

rently selected to receive digital input via

the ADAT Bridge I/O’s optical port. When

the Digital LED is lit, it indicates that chan-

nels 1-2 in Pro Tools are currently selected

to receive digital input via its AES/EBU or

S/PDIF ports. This parameter is set using

the Ch 1-2 Input pop-up in the Pro Tools

Hardware dialog or Session Setup window.

The AES/EBU or S/PDIF inputs can be

routed to Channels 1-2 of either Group A

or Group B. This gives you the flexibility to

set Channel 1-2 to ADAT on Group A, and

Channel 1-2 input to digital on Group B.

This allows you to record eight channels

audio from ADAT on group A, and two

channels of digital input on Group B. If

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