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Chapter 4: Using the ADAT Bridge I/O in Standalone Mode 31
chapter 4
Using the ADAT Bridge I/O in Standalone
Mode
In addition to its role as a bridge between
Pro Tools and ADAT, the ADAT Bridge I/O
can also be used on its own as a stand-alone
S/PDIF or AES/EBU-to-ADAT-optical con-
verter. This capability allows you to digi-
tally transfer audio from DAT or a digital
I/O-equipped CD player or digital mixing
console to ADAT without having to power
on your computer or launch Pro Tools.
Audio received over the ADAT Bridge I/O’s
digital ports can be monitored with 24-bit
fidelity through its analog outputs. These
outputs default to –10 dBV operating levels
when the ADAT Bridge I/O is used in stand-
alone mode.
ADAT Channels Transferred
In standalone mode, only channels 1–2 of
the ADAT format inputs are transferred to
AES/EBU or S/PDIF Outputs. All other
ADAT channels are ignored.
Using Standalone Mode
To use the ADAT Bridge I/O in standalone
mode:
1
Make sure that your computer is off.
2
Connect the digital audio source (the
DAT or digital I/O-equipped CD player) to
the ADAT Bridge I/O.
3
Turn on the digital audio source (the DAT
or digital I/O-equipped CD player).
4
Turn on the ADAT Bridge I/O.
5
The ADAT Bridge I/O will scan both its
S/PDIF and AES/EBU ports for word clock.
Once word clock lock has been achieved,
the ADAT Bridge I/O will switch to digital
sync mode and automatically match its
sample rate to the incoming data. (If the in-
coming word clock is 48 kHz, the 48 kHz
sample rate LED will remain lit. If the in-
coming word clock is 44.1 kHz, the 48 kHz
sample rate LED will flash.) Accordingly,
digital output sent via the ADAT Bridge
I/O’s AES/EBU, S/PDIF, and optical ports
will also match the sample rate of the in-
coming data.