Chapter 7: Connecting Your Studio
63
Digital Audio Connections
Digi 002 and Digi 002 Rack each provide up to
ten digital inputs and outputs, including:
• Optical input and output for eight channels
of ADAT input or two channels of Optical
S/PDIF input
•Two channels of S/PDIF digital input and out-
put (RCA connectors)
ADAT Format
The ADAT format was developed by Alesis for
use in their ADAT multitrack recorders. Each
ADAT optical connection provides eight chan-
nels of digital audio with 24-bit capability. You
can connect an ADAT or other ADAT optical for-
mat device directly to the Optical I/O on the
Digi 002 or Digi 002 Rack (see “Connecting an
ADAT” on page 66). The optical I/O connectors
accept optical cables.
When set for ADAT format, these Optical ports
support 44.1 kHz or 48 kHz sample rates only.
S/PDIF
S/PDIF (Sony/Phillips Digital Interchange For-
mat) I/O is available on many DAT decks, com-
pact disc players, and other digital devices. Each
S/PDIF connection provides 2 channels of digi-
tal audio with 24-bit capability. You can connect
a S/PDIF digital input to either the Optical con-
nector or to the S/PDIF RCA connector on the
back panel of the Digi 002 or the Digi 002 Rack
(see “Connecting a Digital Deck (DAT)” on
page 66). The Optical connectors accept stan-
dard optical “lightpipe” cables; the RCA connec-
tors accept standard RCA cables.
Both the RCA and Optical ports accept S/PDIF
signals at sample rates up to 96 kHz.
Using External Effects
Devices
The Digi 002 and Digi 002 Rack can make dedi-
cated connections to external analog or digital
devices. You can send and return signals to ana-
log devices using the analog inputs and outputs
on the Digi 002 and the Digi 002 Rack. You can
also send and return a digital signal to an exter-
nal device that supports digital I/O (such as a re-
verb unit), and monitor the return by connect-
ing its analog outputs to available inputs on
Digi 002 and Digi 002 Rack.
When you use the digital inputs and outputs on
your Pro Tools LE system as effects sends and re-
turns to a digital effects device, Pro Tools LE
should be the clock master in most cases. Set
your digital effects device to accept an external
digital clock so that it synchronizes to
Pro Tools LE.
Digital connectors (back panel)
Only one S/PDIF input pair can be used at a
time. For example, if you use the optical in-
put for S/PDIF data, you cannot use the
RCA inputs.
S / PDIF
IN
OUT
OPTICAL
MIDI OUT 1MIDI OUT 2
IN
OUT
964530300294856
SERIAL NUMBER
RCA S/PDIF
Input and
Optical
Input and Output ports
Output
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