DigiDesign Digi 002, Getting Started

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Chapter 6: Digi 002 and Digi 002 Rack Back Panels 55
Optical I/O
These are a pair of TOS-link style connectors for
ADAT Optical (8 channels of I/O) or S/PDIF Op-
tical (2 channels of I/O) devices. You can choose
between these Optical I/O formats in the
Pro Tools Hardware Setup dialog. When trans-
ferring material in one of these formats to
Pro Tools, be sure to select the appropriate Opti-
cal I/O format as the Clock Source in the Hard-
ware Setup dialog.
The Optical I/O ports support sample rates of
44.1 and 48 kHz in ADAT Optical mode, and
sample rates up to 96 kHz in Optical S/PDIF
mode. The Optical I/O ports support 24-bit,
20-bit and 16-bit resolutions in both modes.
The Optical I/O ports use a standard optical
“lightpipe” cable.
About Lightpipe-Compatible Devices
Lightpipe is an industry standard, eight-channel
optical digital audio connection developed by
Alesis. Lightpipe is found on many devices, in-
cluding Optical (ADAT) decks, modular digital
multitracks (MDMs), sound cards, stand-alone
A/D or D/A converters, and digital consoles.
MIDI Connectors
Digi 002 and Digi 002 Rack can act as a MIDI in-
terface. With one MIDI input and two MIDI out-
puts, Digi 002 and Digi 002 Rack provide 16
channels of MIDI input and 32 channels of
MIDI output.
A MIDI driver for these MIDI ports is installed
when you install Pro Tools LE, and is recognized
automatically by Windows Multimedia (Win-
dows) and Audio MIDI Setup (Macintosh).
These connectors accept standard 5-pin MIDI
cables.
IEEE-1394 (FireWire) Ports
These ports, marked “1394” in reference to their
IEEE specification, are commonly known as
FireWire ports. These provide connections to the
computer and other FireWire devices.
FireWire offers a high rate of data transfer and
reliability that makes it ideal for audio applica-
tions. FireWire devices can be daisy-chained to-
gether without the need for terminators.
Connecting Digi 002 or Digi 002 Rack and
FireWire Hard Drives
The FireWire ports on Digi 002 and
Digi 002 Rack do not pass audio data when they
are powered off, so if you daisy-chain FireWire
devices from your computer, it is best to con-
nect FireWire hard drives directly to your com-
puter and not to Digi 002. This will prevent
hard drive errors and data loss in case the
Digi 002 unit is powered off.
Connecting other FireWire Devices to Digi 002
or Digi 002 Rack
The second FireWire port on Digi 002 or
Digi 002 Rack is available for daisy-chaining
FireWire devices such as digital cameras or digi-
tal video recorders. Even when they are powered
off, Digi 002 and Digi 002 Rack supply power
from the computer through their FireWire
ports, letting you recharge batteries in other
FireWire devices.
MIDI ports are only active when Pro Tools
is launched.