Specifications

Chapter 1: Introduction to the 192 Digital I/O 1
chapter 1
Introduction to the 192 Digital I/O
The Digidesign 192 Digital I/O 16-channel, all-
digital audio interface is for use in a
Pro Tools|HD system.
The 192 Digital I/O supports the major digital
audio I/O formats (AES/EBU, S/PDIF, ADAT
Lightpipe, and TDIF) and sample rates of up to
192 kHz.
192 Digital I/O Features
• 16 discrete channels of digital input and out-
put, with 4-segment LED meters to monitor
input and output levels on each channel
• Real-time sample rate conversion (up to
192 kHz) of up to eight different pairs of input
formats and sample rates
• Input format can be chosen on a channel-pair
basis from the following format types, pro-
vided on two factory-installed Digidesign Dig-
ital I/O cards:
• 16 channels of 24-bit AES/EBU I/O at sam-
ple rates of up to 96 kHz in single-wire
mode; or 8 channels at sample rates of up
to 192 kHz in dual-wire mode
• 16 channels of 24-bit TDIF I/O at sample
rates of up to 48 kHz
• 16 channels of 24-bit Optical (ADAT) I/O at
sample rates of up to 48 kHz
• Additional digital I/O options are provided by
three sets of enclosure-mounted ports:
•Two additional channels of 24-bit-capable
S/PDIF I/O, supporting sample rates of up
to 96 kHz
•Two additional channels of 24-bit-capable
AES/EBU I/O, supporting sample rates of
up to 96 kHz
• Eight additional channels of 24-bit-capable
ADAT Optical I/O, at up to 48 kHz sample
rates; can be switched to become two chan-
nels of optical S/PDIF I/O, supporting sam-
ple rates of up to 96 kHz
• External Clock input and output for synchro-
nizing 192 Digital I/O with external 1x Word
Clock or 256x (Slave Clock) devices
• Legacy Port for connecting Digidesign-quali-
fied Pro Tools|24 MIX audio interfaces.
• Simultaneous use of multiple Pro Tools|HD
audio interfaces to further expand system in-
put and output. For more information see the
Expanded Systems Guide .