User`s guide

ADAT Bridge I/O 8
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