User guide

Chapter 2: Pro Tools|HD Native Hardware Overview 7
Audio Interfaces
To record and play audio with Pro Tools HD,
you must have at least one Pro Tools|HD audio
interface connected to the Pro Tools|HD Native
card. Pro Tools|HD Native systems support up to
4 Pro Tools|HD audio interfaces for up to 64 si-
multaneous channels of input and output.
HD OMNI
HD OMNI is a professional digital audio inter-
face designed for use with Pro Tools|HD and
Pro Tools|HD Native systems. HD OMNI pro-
vides a compact preamp, monitoring, and I/O
solution for music production and recording,
and post production studios.
HD OMNI Features
HD OMNI provides up to 8 discrete channels of
Pro Tools input and output, with 4-segment
LED meters for input or output (selectable).
Analog I/O
• 24-bit analog-to-digital (A/D) and digital-to-
analog (D/A) converters, with support for
sample rates up to 192 kHz
• 2 high-quality Mic/DI preamps (Channels
1–2)
• 2 combined XLR and 1/4-inch TRS front panel
inputs for microphone and instrument level
input
• 2 XLR back panel microphone inputs
• 2 1/4-inch TRS Send and 2 1/4-inch TRS Re-
turn back panel jacks for hardware inserts on
channels 1 and 2
• 4 analog TRS line level back panel inputs
(Channels 1–4)
• Soft Clip and Curv limiting circuits to protect
against clipping on analog input
• 8 channels of analog back panel output using
a DB-25 breakout cable (sold separately) with
variable output gain
• 2 channels of analog back panel output using
TRS (Mirrors channels 1–2 or 7–8 on DB-25
connector)
• Front panel stereo 1/4” headphone jack
Digital I/O
• 8 channels of AES/EBU output (up to 192 kHz
Single Wire) using a DB-25 breakout cable
(sold separately)
• 2 channels of AES/EBU XLR input (up to
192 kHz Single Wire)
• 2 channels of S/PDIF RCA input and output
(up to 192 kHz)
• 8 channels of ADAT TOSLINK input and out-
put
• Support for ADAT S/MUX Optical for sample
rates of 88.2 kHz, 96 kHz, 176.4 kHz, and
192 kHz
• Support for two channels of S/PDIF Optical
with sample rates of up to 96 kHz
• Real-time sample rate conversion (SRC) on
Digital Inputs 1–2 of either AES/EBU, S/PDIF,
or Optical (S/PDIF)
Pro Tools|HD Native systems do not sup-
port legacy Pro Tools|24 MIX
™
audio inter-
faces (such as the 888|24 or 882|20).
Only one HD OMNI can be used in a single
Pro Tools|HD Native system.
HD OMNI provides multiple analog input
connections, but only provides up to four
channels of simultaneous analog input.
SRC is not supported with ADAT S/MUX.