003, 192 Digital I/O, 192 I/O, 96 I/O, 96i I/O, Adrenaline,
AirSpeed, ALEX, Alienbrain, AME, AniMatte, Archive,
Archive II, Assistant Station, AudioPages, AudioStation,
AutoLoop, AutoSync, Avid, Avid Active, Avid Advanced
Response, Avid DNA, Avid DNxcel, Avid DNxHD, Avid DS
Assist Station, Avid Ignite, Avid Liquid, Avid Media Engine,
Avid Media Processor, Avid MEDIArray, Avid Mojo,
Avid Remote Response, Avid Unity, Avid Unity ISIS,
Avid VideoRAID, AvidRAID, AvidShare, AVIDstripe, AVX,
Beat Detective, Beauty Without The Bandwidth,
Beyond Reality, BF Essentials, Bomb Factory, Bruno, C|24,
CaptureManager, ChromaCurve, ChromaWheel,
Cineractive Engine, Cineractive Player, Cineractive Viewer,
Color Conductor, Command|8, Control|24, Cosmonaut Voice,
CountDown, d2, d3, DAE, D-Command, D-Control, Deko,
DekoCast, D-Fi, D-fx, Digi 002, Digi 003, DigiBase,
Digidesign, Digidesign Audio Engine, Digidesign
Development Partners, Digidesign Intelligent Noise
Reduction, Digidesign TDM Bus, DigiLink, DigiMeter,
DigiPanner, DigiProNet, DigiRack, DigiSerial, DigiSnake,
DigiSystem, Digital Choreography, Digital Nonlinear
Accelerator, DigiTest, DigiTranslator, DigiWear, DINR,
DNxchange, Do More, DPP-1, D-Show, DSP Manager,
DS-StorageCalc, DV Toolkit, DVD Complete, D-Verb, Eleven,
EM, Euphonix, EUCON, EveryPhase, Expander,
ExpertRender, Fairchild, FastBreak, Fast Track, Film Cutter,
FilmScribe, Flexevent, FluidMotion, Frame Chase, FXDeko,
HD Core, HD Process, HDpack, Home-to-Hollywood,
HyperSPACE, HyperSPACE HDCAM, iKnowledge, Impact,
Improv, iNEWS, iNEWS Assign, iNEWS ControlAir, InGame,
Instantwrite, Instinct, Intelligent Content Management,
Intelligent Digital Actor Technology, IntelliRender, Intelli-Sat,
Intelli-Sat Broadcasting Recording Manager, InterFX,
Interplay, inTONE, Intraframe, iS Expander, iS9, iS18, iS23,
iS36, ISIS, IsoSync, LaunchPad, LeaderPlus, LFX, Lightning,
Link & Sync, ListSync, LKT-200, Lo-Fi, MachineControl,
Magic Mask, Make Anything Hollywood,
make manage move|media, Marquee, MassivePack,
MassivePack Pro, Maxim, Mbox, Media Composer,
MediaFlow, MediaLog, MediaMix, Media Reader,
Media Recorder, MEDIArray, MediaServer, MediaShare,
MetaFuze, MetaSync, MIDI I/O, Mix Rack, Moviestar,
MultiShell, NaturalMatch, NewsCutter, NewsView,
NewsVision, Nitris, NL3D, NLP, NSDOS, NSWIN, OMF,
OMF Interchange, OMM, OnDVD, Open Media Framework,
Open Media Management, Painterly Effects, Palladiium,
Personal Q, PET, Podcast Factory, PowerSwap, PRE,
ProControl, ProEncode, Profiler, Pro Tools, Pro Tools|HD,
Pro Tools LE, Pro Tools M-Powered, Pro Transfer,
QuickPunch, QuietDrive, Realtime Motion Synthesis,
Recti-Fi, Reel Tape Delay, Reel Tape Flanger,
Reel Tape Saturation, Reprise, Res Rocket Surfer, Reso,
RetroLoop, Reverb One, ReVibe, Revolution, rS9, rS18,
RTAS, Salesview, Sci-Fi, Scorch, ScriptSync,
SecureProductionEnvironment, Shape-to-Shape,
ShuttleCase, Sibelius, SimulPlay, SimulRecord,
Slightly Rude Compressor, Smack!, Soft SampleCell,
Soft-Clip Limiter, SoundReplacer, SPACE, SPACEShift,
SpectraGraph, SpectraMatte, SteadyGlide, Streamfactory,
Streamgenie, StreamRAID, SubCap, Sundance,
Sundance Digital, SurroundScope, Symphony, SYNC HD,
SYNC I/O, Synchronic, SynchroScope, Syntax,
TDM FlexCable, TechFlix, Tel-Ray, Thunder, TimeLiner,
Titansync, Titan, TL Aggro, TL AutoPan, TL Drum Rehab,
TL Everyphase, TL Fauxlder, TL In Tune, TL MasterMeter,
TL Metro, TL Space, TL Utilities, tools for storytellers, Transit,
TransJammer, Trillium Lane Labs, TruTouch, UnityRAID,
Vari-Fi, Video the Web Way, VideoRAID, VideoSPACE,
VTEM, Work-N-Play, Xdeck, X-Form, and XMON are either
registered trademarks or trademarks of Avid Technology, Inc.
in the United States and/or other countries.
Bonjour, the Bonjour logo, and the Bonjour symbol are
trademarks of Apple Computer, Inc.
Thunderbolt and the Thunderbolt logo are trademarks of Intel
Corporation in the U.S. and/or other countries.
This product may be protected by one or more U.S. and nonU.S. patents. Details are available at www.avid.com/patents.
Product features, specifications, system requirements, and
availability are subject to change without notice.
Guide Part Number 9320-65263-00 REV B 08/14
Contents
Chapter 1.
Pro Tools | HD I/O Features
What’s Included
System Requirements and Compatibility
Registration
About This Guide
About www.avid.com
Chapter 2.
Pro Tools | HD I/O Front Panel
Pro Tools | HD I/O Back Panel
Chapter 3.
Connecting Pro Tools | HD I/O to Pro Tools | HDX Cards
Connecting Pro Tools | HD I/O to a Pro Tools | HD Native Card
Connecting Pro Tools | HD I/O to Pro Tools|HD Cards
Pro Tools®|HDI/O by Avid® is a multi-channel
digital audio interface designed for use with
®
Pro Tools
Pro Tools
| HDX, Pro Tools®| HD Native, and
®
| HD systems. HD I/O features 24-bit
analog-to-digital (A/D) and digital-to-analog
(D/A) converters, and supports sample rates of up
to 192 kHz.
HD I/O comes in three standard configurations:
• 8 x 8 x 8 (8 analog in, 8 analog out, and 8 digital in and out)
• 16 x 16 analog in and out
• 16 x 16 digital in and out
You can also add or remove analog (ADC and
DAC) and digital cards for custom configurations.
Pro Tools | HD I/O Features
HD I/O provides up to sixteen discrete channels of
audio input and output, each with a four-segment
LED meter. The total available analog and digital
I/O is dependent on the configuration of Analog
and Digital Expansion I/O cards installed in
HD I/O.
Analog I/O
• Up to 16 channels of 24-bit D/A and A/D converters for superior analog input and output at
sample rates of 44.1 kHz, 48 kHz, 88.2 kHz,
96 kHz, 176.4 kHz, and 192 kHz with Analog In
and Analog Out HD I/O cards
• Soft Clip and Curv limiting circuits to protect
against clipping on analog input
Digital I/O
• Up to 16 channels of 24-bit digital I/O, using
AES/EBU, TDIF DB-25, or Optical at sample
rates of 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz,
176.4 kHz, and 192 kHz with a Digital HD I/O
card
• Real-time sample rate conversion on digital inputs with a Digital I/O card (up to sixteen channels of AES/EBU, Optical, or TDIF)
• Support for S/MUX Optical for sample rates of
88.2 kHz and higher
• Support for 2 channels of S/PDIF Optical
(enclosed) with sample rates of up to 96 kHz
• 2 channels of AES/EBU I/O (enclosed) with
support for sample rates up to 192 kHz
• 2 channels of 24-bit-capable S/PDIF I/O
(enclosed) with support for sample rates up to
192 kHz
Chapter 1: Introduction1
Synchronization
• Loop Sync input and output for connecting additional Avid HD audio interfaces and peripherals
• External Clock input and output for synchronizing HD I/O with external Word Clock devices
Expandability
• Optional addition of I/O cards to expand analog
or digital I/O
• Simultaneous use of multiple Avid HD audio interfaces to further expand system input and output
System Requirements and
Compatibility
Avid can only assure compatibility and provide
support for hardware and software it has tested and
approved.
For complete system requirements and a list of
qualified computers, operating systems, hard
drives, and third-party devices, visit:
www.avid.com/compatibility
Registration
What’s Included
• Pro Tools | HD I/O audio interface
• AC power cable
• DigiLink Mini cable (18 inches [0.46m])
• DigiLink Mini adapter
• BNC cable (18 inches [0.46m])
• Pro Tools | HD I/O Guide
• Health and Safety Guide
• Registration Information Card
Review the enclosed Registration Information
Card and follow the instructions on it to quickly
register your purchase online. By registering, you
become eligible to receive the following:
• Technical support information
• Software update and upgrade notices
• Hardware warranty information
Hardware Warranty
Your warranty can be found on the Registration
Information Card.
Pro Tools | HD I/O Guide2
About This Guide
This guide provides a basic overview of
Pro Tools | HD I/O features and functionality.
For hardware installation instructions for your
Pro Tools | HDX hardware, see the
Pro Tools | HDX Card Installation Guide.
Conventions Used in This Guide
All of our guides use the following conventions to
indicate menu choices and key commands:
:
ConventionAction
File > SaveChoose Save from the
File menu
For hardware installation instructions for your
Pro Tools | HD Native hardware, see the
Pro Tools | HD Native Installation Guide.
For hardware installation instructions for your
Pro Tools|HD hardware, see the Pro Tools|HD
User Guide.
For Pro Tools software installation instructions,
see the Pro Tools | Software Installation Guide.
For additional information about using Pro Tools
software, see the Pro Tools Reference Guide (in
Pro Tools, choose
).
Guide
Help > Pro Tools Reference
Control+NHold down the Control key
and press the N key
Control-clickHold down the Control key
and click the mouse button
Right-click Click with the right
mouse button
The names of
Commands, Options
, and
Settings
that appear on-screen are in a different font.
The following symbols are used to highlight
important information:
User Tips are helpful hints for getting the
most from your system.
Important Notices include information that
could affect your data or the performance of
your system.
Shortcuts show you useful keyboard or mouse
shortcuts.
Cross References point to related sections in
this guide and other Pro Tools guides.
Chapter 1: Introduction3
About www.avid.com
The Avid website (www.avid.com) is your best
online source for information to help you get the
most out of your Pro Tools system. The following
are just a few of the services and features available.
Product Registration
Register your purchase
online.
Support and Downloads
Contact Avid Customer
Success (technical support); download software
updates and the latest online manuals; browse the
Compatibility documents for system requirements;
search the online Knowledge Base or join the
worldwide Pro Tools community on the User
Conference.
Training and Education
Study on your own using
courses available online or find out how you can
learn in a classroom setting at a certified Pro Tools
training center.
Products and Developers
Learn about Avid products; download demo software or learn about our
Development Partners and their plug-ins, applications, and hardware.
News and Events
Get the latest news from Avid or
sign up for a Pro Tools demo.
Pro Tools | HD I/O Guide4
Chapter 2: Pro Tools | HD I/O Overview
This chapter describes the front and back panel features of the Pro Tools | HD I/O.
Pro Tools | HD I/O Front Panel
HD I/O Front Panel
Power Switch and LED Ring
This button turns HD I/O on and off. The LED ring
around the power button will light green or orange
to indicate the system status:
Green LED Ring
ered up successfully and is connected to an active
system.
Orange LED Ring
power, but the computer it is connected to is shut
down.
Indicates that the unit has pow-
Indicates that the unit has
Sample Rate
These LEDs display the current sample rate of the
HD I/O internal clock: 44.1 kHz, 48 kHz,
88.2 kHz, 96 kHz, 176.4 kHz, or 192 kHz. The
sample rate can be set in Pro Tools when you create a new session, or in the Hardware Setup or
Playback Engine dialogs if no session is open.
Chapter 2: Pro Tools | HD I/O Overview5
Loop Master LED
The LOOP MASTER LED indicates which audio
interface is the master peripheral. The Loop Master LED will be continuously lit on the current
Loop Master peripheral only, and unlit on all other
peripherals. (Only one Avid HD peripheral can be
Loop Master at a time.) The Loop Master LED will
always be lit with a single interface.
With HDX hardware, Loop Master defaults to the
first audio interface connected to DigiLink Mini
Port 1 on the first card in the system.
EXT (External)
Indicates that the HD I/O is using
the EXT CLOCK IN port for system synchronization.
When synchronized to Word Clock, External
Clock input and output do not have to be at the
Word Clock rate. EXT CLOCK IN synchronization will typically be 1x the current session sample
rate. However, for sample rates higher than 48
kHz, HD I/O generates a choice of 1x, 2x, or 4x of
a base rate of 44.1 kHz or 48 kHz, as
follows:
With HD Native hardware, Loop Master defaults
to the first audio interface connected to DigiLink
Mini Port 1 on the HD Native card.
For Pro Tools|HD systems, Loop Master defaults
to the first audio interface connected to the primary, or “core” Pro Tools|HD card. On
Pro Tools|HD (for PCIe), this is the Accel Core
card. On Pro Tools|HD (for PCI), this is the HD
Core card.
Sync Mode LEDs
The SYNC MODE LEDs indicate the current
Clock Source as set in Pro Tools.
INT (Internal)
generated by its internal clock, as determined by
the session Sample Rate.
DIG (Digital)
TDIF, Optical (ADAT), Optical (ADAT S/MUX),
or S/PDIF device is providing system clock. If no
valid clock source is detected, HD I/O will switch
to internal clock, the DIG LED will flash, and an
error message will appear on-screen in Pro Tools.
LOOP
Indicates that the HD I/O is slaving to another Avid HD audio interface or SYNC peripheral
using Loop Sync.
Indicates the HD I/O sample clock is
Indicates that an external AES/EBU,
Session Sample RateWord Clock Support
44.1 kHz44.1 kHz
48 kHz48 kHz
88.2 kHz88.2 kHz
44.1 kHz
96 kHz96 kHz
48 kHz
176.4 kHz176.4 kHz
44.1 kHz
192 kHz192 kHz
48 kHz
Meters
These four-segment LEDs indicate signal level for
each of the sixteen channels. The top row of meters
indicates input levels, and the bottom row shows
output levels. These meters are calibrated at –42
dB, –18 dB, –6 dB, and 0 dB,
respectively.
Note that 0 dB is not to be confused with clipping; use the on-screen meters in Pro Tools
to determine whether a signal is clipping.
Pro Tools | HD I/O Guide6
Pro Tools | HD I/O Back Panel
964530300294856
WORD CLOCK
LOOP SYNC
PRIMARY PORT
EXPANSION PORT
IN
OUT
AC ~ 100-240V;50-60HZ; A
S/PDIF
IN
OUT
AES/EBU
INPUT
AES/EBU
OUTPUT
OPTICAL
IN
OUT
ACCESSORY
1
2
3
4
5
6
7
8
ANALOG INPUT
+4 dBu BALANCED
-10 dBV BALANCED
1
2
3
4
5
6
7
8
ANALOG OUTPUT
BALANCED
DIGITAL I/O
AES/EBU
ADAT
IN
TDIF I/O
ADAT
OUT
Bay 2: Analog Out card
Bay 1: Analog In card
Bay 3: Digital I/O card
Bay 4: Empty for Optional card
Enclosure
HD I/O Back Panel, 8 x 8 x 8 configuration shown
Although the HD I/O is a sixteen-channel audio interface, it has up to 94 inputs and outputs available
through its various back panel
connectors.
HD I/O comes in three standard configurations:
• 8 x 8 x 8 analog and digital in and out
• 16 x 16 analog in and out
• 16 x 16 digital in and out
Input and Output Cards
The HD I/O features four bays for HD I/O
Expansion cards. With the standard 8 x 8 x 8 configuration, bays 1–3 contain Analog In, Analog
Out, and Digital I/O cards, respectively. The fourth
bay (as shown in this 8 x 8 x 8 configuration) is an
expansion bay, for which you can purchase an additional Expansion I/O card of your choice.
By installing an optional AD Expansion card, DA
Expansion card, or Digital Expansion card, you
can add even more I/O capacity (up to a maximum
possible 110 inputs and outputs). See Chapter 5,
“Adding or Removing I/O Cards.”
Input and Output cards for 192 I/O are not
supported in HD I/O.
Chapter 2: Pro Tools | HD I/O Overview7
Analog Input
Analog Output
The HD I/O Analog In card contains connectors
for analog audio input with 24-bit, 192 kHz A/D
converters. Input is provided through two discrete
DB–25 connectors (one for +4 dBu sources, and
the other for –10 dBV sources). You can connect
sources at both operating levels and choose between them from within Pro Tools.
+4 dBu Balanced
Provides eight balanced input
channels at +4 dBu nominal operating levels.
–10 dBV Balanced
Provides eight balanced input
channels at –10 dBV nominal operating levels.
Most consumer electronics operate at –10 dBV
levels, and may not feature balanced inputs and
outputs. You can connect –10 dBV signals to
the –10 dBV inputs, but you will need to make
sure that the negative terminals are not connected.
For wiring information, see Chapter 6, “Pinout Diagrams for the DB-25 Connectors.”
The HD I/O Analog Out card contains a single
DB–25 connector and Output Trims for eight
channels of analog audio output. These balanced
outputs operate at +4 dBu levels. See Chapter 6,
“Pinout Diagrams for the DB-25 Connectors.”
For –10 dBV gear, you can switch a jumper
on Analog Output cards (on a channel-bychannel basis) from the default Hi position
to Lo for a –6 dB pad. You can then adjust
the Trim pot for the corresponding output
channels by an additional –4 dB to accommodate –10 dBV gear. For more information, see Chapter 7, “HD I/O Calibration
Mode Instructions.”
Output Trims
The Output Trims below the DB–25 connector are
used to individually calibrate each channel’s output level. For more information, see Chapter 7,
“HD I/O Calibration Mode Instructions.”
For each channel, you can select input level from
within the Hardware Setup dialog (see “Hardware
Setup” on page 21).
Input Trims
The Input Trims below the DB–25 connectors are
used to individually calibrate each channel’s input
level. See “Input Trims” on page 30.
Additionally, the Limiter function helps avoid digital clipping (see“Limiter” on page 26).
Pro Tools | HD I/O Guide8
Digital I/O
The inputs on the Digital I/O card feature real-time
sample rate conversion. For example, you can
stream audio with a sample rate of 44.1 kHz into a
96 kHz session.
For more information, see“Hardware Setup”
on page 21.
The Digital I/O card contains connectors for eight
channels each of AES/EBU I/O, TDIF I/O, and
Optical (ADAT) I/O. Only one digital format can
be used at a time.
AES/EBU
DB–25 connectors for eight channels of
AES/EBU input and output. Each of the paired
channels is a balanced three-conductor signal, and
supports 192 kHz sample rates in single-wire
mode up to eight channels. Dual-wire mode uses
two HD I/O physical I/O channels of AES/EBU
I/O to carry each single stream of 176.4 kHz or
192 kHz audio. Therefore, only four simultaneous
channels of AES/EBU I/O are available at
176.4 kHz or 192 kHz.
TDIF
DB–25 connectors for eight channels of
TDIF input and output. Conforms to standard
eight-channel TDIF pinouts. For more information, see Chapter 6, “Pinout Diagrams for the DB25 Connectors.”
We recommend using Avid DB-25 TDIF
cables for optimum compatibility.
Optical (ADAT)
Dedicated, eight-channel 24-bit
capable Optical ports (up to 48 kHz), with realtime sample rate conversion on input (only). Note
that Optical S/PDIF is not supported with the Digital I/O card and is supported with the enclosed
Optical ports only (for more information, see “Optical (ADAT) [Encl]” on page 10).
Enclosure Connectors
The right half of the back panel of HD I/O features
a set of non-removable connectors that are
mounted to the enclosure.
These connectors include two channels of
AES/EBU IO, Optical I/O (for another eight channels of ADAT format, or two channels of Optical
S/PDIF), and two channels of coaxial S/PDIF I/O.
On-screen, these connectors are identified as
AES/EBU [Encl], Optical (ADAT) [Encl], Optical
(S/PDIF) [Encl], and S/PDIF [Encl].
Other connectors include Loop Sync, External
Clock, and ports for attaching the HD I/O to HDX,
HD Native, or Pro Tools|HD cards, or to other
Avid HD audio interfaces.
Chapter 2: Pro Tools | HD I/O Overview9
AES/EBU [Encl]
These are balanced, three-conductor XLR connectors that accept and output a stereo, 24-bit
AES/EBU audio signal. These two ports support
up to 192 kHz sample rates.
Optical (ADAT) [Encl]
These Optical ports provide up to eight channels of
Optical (ADAT) input and output, or two channels
(stereo) optical S/PDIF input and output. Optical
(ADAT) mode supports sample rates up to 48 kHz.
Using S/MUX, these Optical ports support provide
up to four channels of Optical S/MUX input and
output at sample rates of 88.2 and 96 kHz, and up
to two channels of Optical S/MUX input and output at sample rates of 176.4 and 192 kHz. In TOSLink mode, the ports support two channels of Optical input and output at sample rates up to 96 kHz.
Configure HD I/O for ADAT S/MUX on the
enclosed ADAT port and also on the ADAT
port on the Digital I/O card to get 8 channels
at 88.2/96 kHz or 4 channels at
176.4/192 kHz.
About Lightpipe-Compatible Devices
Lightpipe is an industry standard, eight-channel
optical digital audio connection created by Alesis.
Lightpipe is found on many devices, including Optical (ADAT) decks, modular digital multitracks
(MDMs), A/D or D/A converters, S/MUX, and
digital consoles.
DigiLink Mini Ports
PRIMARY PORT
Use the PRIMARY PORT to connect HD I/O to
HDX or HD Native cards using a DigiLink Mini
cable, or to Pro Tools|HD cards using a DigiLink
cable with a DigiLink Mini adapter.
The Primary port sends and receives 32 channels to
and from an HDX, HD Native, or Pro Tools|HD
card. Input and output channels 17–32 (if active)
are passed through to the EXPANSION PORT.
EXPANSION PORT
The EXPANSION PORT lets you connect an additional Avid HD audio interface to HD I/O. The
EXPANSION PORT passes input and output
channels 17–32 to the expansion (or secondary)
audio interface.
This port is only available when HD I/O is connected directly to an HDX, HD Native, or
Pro Tools|HD card. It is not available when the
HD I/O is connected to the Expansion Port on another audio interface.
S/PDIF Digital In and Out
These are unbalanced RCA jacks that receive and
send two channels of S/PDIF audio. S/PDIF supports up to 24-bit audio, at sample rates up to 192
kHz.
To maintain data integrity and minimize jitter, use only 75-ohm coaxial cable for
S/PDIF connections.
Pro Tools | HD I/O Guide10
DigiLink Mini Cables and Adapters
Avid provides various cables and adapters to connect Avid HD audio interfaces to HDX,
HD Native, and Pro Tools|HD cards.
For more information about DigiLink Mini
cables and adapters, visit the Avid website
(www.avid.com).
Clock and Synchronization Ports
DigiLink Mini Cables
Use a DigiLink Mini cable to connect an HD I/O to
an HDX or HD Native card, or to other Avid HD
audio interface (such as another HD I/O).
There are five different lengths of DigiLink Mini
cables:
• 18 in (0.46m)
• 12 ft (3.6m) (sold separately)
• 25 ft (7.62m) (sold separately)
• 50 ft (15.25m), the maximum length supported for 176.4 kHz and 192 kHz sessions
(sold separately)
• 100 ft (30.5m), the maximum length supported by 88.2 kHz and 96 kHz sessions (sold
separately)
DigiLink Mini Adapters
Use a DigiLink cable with a DigiLink Mini adapter
to connect HD I/O to a Pro Tools|HD card. You
can also use a DigiLink Mini adapter to connect
HD I/O to legacy Pro Tools|HD audio interfaces
(such as 192 I/O).
WD CLOCK IN and OUT
The Word Clock I/O ports are standard BNC connectors that receive and output word clock signal.
These ports can be used to synchronize HD I/O
with any word clock-capable device.
Word Clock In can be configured by selecting it as
the Clock Source in the Hardware Setup dialog in
Pro Tools. Word Clock Out can also be configured
in the Hardware Setup dialog using the External
Clock Output selector.
Because crucial timing data is passed
through the Loop Sync and Word Clock
ports, you should use high-quality, 75-Ohm
RG–59 cables for making connections.
There are two types of DigiLink Mini adapters:
• 12 in DigiLink Mini female to DigiLink male
• 12 in DigiLink Mini male to DigiLink female
Chapter 2: Pro Tools | HD I/O Overview11
LOOP SYNC In and Out
Loop Sync is a dedicated clock loop for synchronizing multiple Pro Tools|HD peripherals together
(multiple audio interfaces, or a SYNC HD and one
or more audio interfaces). Loop Sync technology
lets you synchronize to any digital peripheral connected to any of the Pro Tools|HD audio interfaces
in your Pro Tools system. Loop Sync uses a word
clock signal based on sample rates of either
44.1 kHz or 48 kHz. As sample rate increases in
the system, Loop Sync continues to operate at a
base rate of 44.1 kHz or 48 kHz, depending upon
the higher rate.
The Loop Sync In and Out ports are standard BNC
connectors that output a 1x Word clock signal.
Loop Sync should only be used to chain multiple
Pro Tools|HD peripherals together (such as
Pro Tools|HD audio interfaces and SYNC HD).
AC Power
This connector accepts a standard AC power cable.
HD I/O is auto power-selecting (100V to 240V)
and will automatically work with a standard modular cable (IEC) to connect to AC power outlets in
any country.
Accessory Port
This port currently has no functionality.
Pro Tools | HD I/O Guide12
Chapter 3: Connecting Pro Tools | HD I/O
Pro Tools | HD I/O provides up to sixteen channels
of analog and digital I/O with HD I/O with HDX,
HD Native, or Pro Tools|HD hardware.
HDX
With Pro Tools | HDX hardware, HD I/O is
connected to the HDX card using a DigiLink Mini
cable. You can connect additional HD audio interfaces to your system using the Expansion port on
the back of HD I/O, the second DigiLink Mini Port
on the HDX card, or by using additional HDX
cards. See “Connecting Pro Tools | HD I/O to
Pro Tools | HDX Cards” on page 14.
For more information about installing HDX
cards, see the Pro Tools | HDX Installation
Guide
.
HD Native
With Pro Tools | HD Native hardware,
HD I/O is connected to the HD Native card using a
DigiLink Mini cable. You can connect additional
HD audio interfaces to your system using the Expansion port on the back of HD I/O or the second
DigiLink Mini Port on the HD Native card. See
“Connecting Pro Tools | HD I/O to a
Pro Tools | HD Native Card” on page 16.
Pro Tools|HD
With Pro Tools|HD hardware,
HD I/O is connected to a Pro Tools|HD card
using a DigiLink cable with a DigiLink Mini
adapter. You can connect additional HD audio interfaces to your system using the Expansion port
on the back of HD I/O or using additional
Pro Tools|HD cards. See “Connecting
Pro Tools | HD I/O to Pro Tools|HD Cards” on
page 18.
For more information about installing
Pro Tools|HD cards, see the Pro Tools|HD
User
Guide
.
Rack Mounting HD Audio Interfaces
HD I/O and all Avid HD audio interfaces need
room at their sides to maintain proper air flow for
cooling. Do not block the sides of the unit or disconnect the internal fan. If the units are rackmounted in a case, remove the case lids or doors
before operating the system. Failure to do so can
result in the units overheating very quickly, which
can permanently damage sensitive
components.
For more information about installing the HD
Native card, see the Pro Tools | HD Native
Installation
Guide
.
Chapter 3: Connecting Pro Tools | HD I/O13
Connecting Pro Tools | HD I/O to Pro Tools | HDX Cards
Each HDX card supports up to 64 channels of audio input and output. To get a full 64 channels of I/O, you
can connect up to four 16-channel HD I/O to an HDX card. Two of the interfaces connect directly to DigiLink Mini Ports 1 and 2, and the other two HD I/O connect to the Expansion ports on first two HD I/O.
To connect HD I/O to an HDX card:
Connect the HD I/O Primary Port to DigiLink Mini Port 1 on the HDX card using a DigiLink Mini cable.
Figure 1. HD I/O connected to the DigiLink Mini Port 1 on an HDX card
To connect additional HD I/O audio interfaces:
1
After connecting the primary audio interface,
connect additional HD I/O (or other compatible
audio interfaces) by doing one of the following:
• Connect the Primary Port of the secondary interface to the Expansion Port of the primary
interface with a DigiLink Mini cable.
• Connect the Primary Port of the secondary in-
Connecting Loop Sync
If you are using two or more HD audio interfaces
or a SYNC peripheral, Loop Sync must be connected to maintain proper clock synchronization
among the devices. For an example of connecting
multiple Avid HD audio interfaces, see Figure 2 on
page 15. For examples that include a SYNC peripheral, see the SYNC HD Guide.
terface to DigiLink Mini Port 2 on the HDX
card.
2
Repeat the preceding with additional HDX
cards.
3
Make the necessary Loop Sync connections
(see “Connecting Loop Sync” on page 14).
To make Loop Sync connections:
1
Connect the Loop Sync Out of each interface to
the Loop Sync In of the next interface with a
BNC cable.
2
Connect the Loop Sync Out of the last interface
to the Loop Sync In of the primary interface or
SYNC peripheral with a BNC cable.
Pro Tools | HD I/O Guide14
Second HDX card
First HDX card
Figure 2. Making DigiLink and Loop Sync connections with two HDX cards, one HD OMNI, and five HD I/Os
Chapter 3: Connecting Pro Tools | HD I/O15
Connecting Pro Tools | HD I/O to a Pro Tools | HD Native Card
To connect HD I/O to an HD Native card:
Connect the HD I/O Primary Port to DigiLink Mini Port 1 on the HD Native card using the included
DigiLink Mini cable.
PORT 1PORT 2
Figure 3. HD I/O connected to the DigiLink Mini Port 1 on an HD Native card
To connect two HD I/Os to an HD Native card:
1
Connect the Primary Port to DigiLink Mini Port 1 on the HD Native card using the included DigiLink
Mini cable.
2
Connect the additional HD I/O (or other compatible Pro Tools audio interface) by doing one of the
following:
• Connect the Primary Port of the secondary interface to the Expansion Port of the primary
interface with an additional DigiLink Mini cable (or DigiLink to DigiLink Mini adapter).
• Connect the Primary Port of the secondary interface to DigiLink Mini Port 2 on the HD Native card.
3
Make the necessary Loop Sync connections (see “Connecting Loop Sync” on page 17).
Pro Tools | HD I/O Guide16
Connecting Loop Sync
PORT 1PORT 2
If you are using two or more Pro Tools audio interfaces or a SYNC peripheral, Loop Sync must be
connected to maintain proper clock synchronization among the devices. For examples that include a SYNC
peripheral, see the SYNC HD Guide. For an example of connecting multiple Avid HD audio
interfaces, see Figure 4 below.
To make Loop Sync connections:
1
Connect the Loop Sync Out of each interface to the Loop Sync In of the next interface with a BNC
cable.
2
Connect the Loop Sync Out of the last interface to the Loop Sync In of the primary interface or SYNC
peripheral with a BNC cable.
Figure 4. DigiLink Mini and Loop Sync connections for two HD I/Os with HD Native
Chapter 3: Connecting Pro Tools | HD I/O17
Connecting Pro Tools | HD I/O to Pro Tools|HD Cards
12-foot DigiLink cable with
DigiLink Mini adapter
To connect HD I/O to a Pro Tools|HD card:
Connect HD I/O Primary Port to the DigiLink Port on the first available Pro Tools|HD card with a DigiLink cable (included with your Pro Tools|HD hardware) and a DigiLink Mini adapter.
Figure 5. HD I/O connected to the DigiLink Port on a Pro Tools|HD Accel Core card (16-channel I/O system)
To connect multiple HD I/Os to a Pro Tools|HD system:
1
Connect the Primary Port of the first HD I/O to the DigiLink Port on the Pro Tools|HD Accel Core card
with a DigiLink cable (included with your Pro Tools|HD system) and a DigiLink Mini adapter.
2
Do one of the following:
• Connect the Primary Port of the second HD I/O to the Expansion Port on the first HD I/O with the
included 18-inch DigiLink Mini cable.
• Connect the Primary Port of the second HD I/O to the next available Pro Tools|HD card with a
DigiLink cable and a DigiLink to DigiLink Mini adapter.
3
Connect additional HD I/Os to additional Pro Tools|HD cards.
4
Make the necessary Loop Sync connections.
Pro Tools | HD I/O Guide18
Connecting Loop Sync
Pro Tools|HD Accel Core card
Pro Tools|HD Accel card
If you are using two or more Pro Tools audio interfaces or a SYNC peripheral, Loop Sync must be
connected to maintain proper clock synchronization among the devices. For an example of connecting
multiple Avid HD audio interfaces, see Figure 6 below.
To make Loop Sync connections:
1
Connect the Loop Sync Out of each interface to the Loop Sync In of the next interface with a BNC
cable.
2
Connect the Loop Sync Out of the last interface to the Loop Sync In of the primary interface or SYNC
peripheral with a BNC cable.
Figure 6. Making DigiLink and Loop Sync connections with two Pro Tools|HD cards, one HD OMNI,
and three HD I/Os
Chapter 3: Connecting Pro Tools | HD I/O19
Pro Tools | HD I/O Guide20
Chapter 4: Configuring Pro Tools | HD I/O in
Pro Tools | HD Software
This chapter explains how to configure
Pro Tools | HD Software for use with
Pro Tools | HD I/O.
For more information about configuring
Pro Tools, see the Pro Tools Reference
Guide
.
Hardware Setup
In the Hardware Setup dialog, Pro Tools lets you
set the default sample rate (if no session is open)
and clock source for your system, and provides access to a range of controls specific to each type of
audio interface.
Default Sample Rate
The
Sample Rate
sample rate when you create a new session. (This
setting is available in the Hardware Setup dialog
only when no session is open.)
setting appears as the default
To change the default Sample Rate for new
sessions:
1
If a Pro Tools session is currently open, close it.
2
Choose
3
From the
Setup > Hardware
Sample Rate
pop-up menu, select the
.
sample rate that you want.
Selecting the default sample rate
You can change the sample rate when
creating a new Pro Tools session by
selecting a different sample rate in the
New Session dialog.
4
Click OK.
Chapter 4: Configuring Pro Tools | HD I/O in Pro Tools | HD Software21
High Sample Rates and Expanded
Pro Tools|HD Systems
With 176.4 kHz and 192 kHz sample rates, as
many as four Pro Tools|HD cards can be used. Any
additional cards (up to the total system maximum
of seven cards) will switch to Inactive mode. The
Pro Tools|HD cards and any attached peripherals
will become active again when the sample rate is
set to 96 kHz or lower. See the Pro Tools
Expanded Systems Guide for more information.
Clock Source
The Pro Tools Hardware Setup dialog lets you set
Clock Source
the
Internal
If you are recording an analog signal
directly into Pro Tools, you will usually use the
Pro Tools
External
Internal
If you are transferring material into
Pro Tools from an external digital device, or if you
utilize a common house clock signal, you will need
to synchronize Pro Tools to that digital device or
common signal. Depending on your audio interface configuration and the selected sample rate,
external options can include:
for the system.
clock source.
To select the Clock Source:
1
Choose
2
From the
Setup > Hardware.
Clock Source
pop-up menu, select the
clock source.
Selecting the Clock Source
3
Click OK.
Your digital input device must be connected
and powered on for Pro Tools to synchronize
to it. If your input device is not powered on,
leave the Clock Source set to Internal.
S/PDIF [Encl]
•
Optical (S/PDIF) [Encl]
•
AES/EBU [Encl]
•
AES/EBU 1–8
•
(at all sample rates)
(Single Wire in stereo pairs at
all sample rates)
AES/EBU 1–4 (Dual Wire)
•
176.4 and 192 kHz)
ADAT 1–8
•
•
ADAT S/MUX 1–4
•
ADAT S/MUX 1–2
TDIF 1–8
•
Optical ADAT [Encl]
•
Word Clock
•
Pro Tools | HD I/O Guide22
(at 44.1 and 48 kHz)
(at 44.1 and 48 kHz)
(at all sample rates)
(up to 96 kHz)
(at all sample rates)
(in stereo pairs at
(at 88.2 and 96 kHz)
(at 176.4 and 192 kHz)
(at 44.1 and 48 kHz)
Identify
If you have multiple audio interfaces of the same
type connected to your system, you should confirm
the identity of each interface. This ensures that you
select the appropriate interface in the Peripherals
list when defining its inputs and outputs, and other
settings, in the Hardware Setup dialog.
To identify audio interfaces in your system:
1
Choose
2
From the Peripherals list, select an audio
interface connected to your system.
3
Select the
left corner of the Hardware Setup dialog. This
illuminates all the LEDs on the front panel of
the selected audio interface.
4
Make a note of which interface in your studio
setup corresponds to the identified interface.
Setup > Hardware.
Use the Up and Down Arrow keys to scroll
though the Peripherals list in the Hardware
Setup dialog.
Identify
option, located in the lower
Configuring HD I/O
To configure controls for HD I/O:
1
Choose
2
From the Peripherals list, select the HD I/O
audio interface.
3
Click the
HD I/O Hardware Setup, Main page
4
If you have at least one HD I/O AD card, click
the
you have two HD I/O AD cards, this tab is labeled
Setup > Hardware
Main
tab and configure the options.
Analog In
Analog In 1–8
tab and configure the options. If
.
.
5
Repeat the above steps for each additional audio
interface in your setup.
HD I/O Hardware Setup, Analog In page
Chapter 4: Configuring Pro Tools | HD I/O in Pro Tools | HD Software23
5
If you have two HD I/O AD cards, click the
alog In 9–16
HD I/O Hardware Setup, Analog In 9–16 page
6
If you have at least one HD I/O Digital card,
click the
tab and configure the options.
Digital
tab (this is labeled
Digital 1–8
you have two HD I/O Digital card installed) and
configure the options.
An-
if
HD I/O Hardware Setup Options
HD I/O provides multiple pages of Hardware
Setup options depending on the configuration.
Main Page
HD I/O supports up to sixteen channels of
simultaneous input and output in multiple I/O
formats (including analog, AES/EBU, ADAT
Optical, S/MUX, S/PDIF, and TDIF).
The Main page of the Hardware Setup dialog is
where you define which physical inputs and outputs on your audio interface are routed to available
input and output channels in Pro Tools. You can
think of this window as a patchbay that lets you
route any of the input pairs or output pairs on your
Pro Tools audio interfaces to channel assignments
in the Pro Tools mixer.
HD I/O Hardware Setup, Digital page
At session sample rates above 48 kHz, sample
rate conversion for the TDIF and Optical
(ADAT) inputs on the HD I/O Digital card is
automatically enabled on all eight inputs of
the selected format unless you are using
S/MUX Optical.
7
If you have two HD I/O Digital cards installed,
click the
Digital 9–16
tab and configure the
options.
8
When you are finished, click OK.
Pro Tools | HD I/O Guide24
HD I/O Hardware Setup, Main page (8 x 8 x 8 shown)
Input
Inputs and Outputs of Similar Formats
Select the corresponding physical inputs from the
Input pop-up menu for each stereo pair of
Pro Tools Input channels (1–2, 3–4, ...15–16).
Which physical inputs are available depends on the
sample rate and on which HD I/O Expansion cards
you have installed (for example, if no HD I/O AD
card is installed, no analog inputs will be available).
These settings are saved with the system, not
with the session.
Output
Select the corresponding physical outputs from the
Output pop-up menu for each stereo pair of
Pro Tools Output channels (1–2, 3–4, ...15–16).
Which physical outputs are available depends on
the sample rate and on which HD I/O Expansion
cards you have installed (for example, if no HD I/O
DA card is installed, no analog outputs will be
available).
Inputs and outputs of similar formats are differentiated in the input and output channel pop-up
menus. For example, the AES/EBU inputs and outputs in the HD I/O enclosure are listed as
AES/EBU [Encl]
, while the AES/EBU inputs and
outputs on a HD I/O Digital card are listed (in
pairs) as
5–6,
AES/EBU 1–2, AES/EBU 3–4, AES/EBU
and
AES/EBU 7–8
. For HD I/Os equipped
with an second Digital card, the additional
AES/EBU I/O ports on the optional card are listed
AES/EBU 9–10, AES/EBU 11–12, AES/EBU
as
and
13–14,
Digital Format
AES/EBU 15–16.
Select from the following digital input formats for
the built-in digital I/O enclosure (configure the options for any additional HD I/O Digital cards by
Digital
clicking the corresponding
AES/EBU
Provides up to two channels of
tab):
AES/EBU input.
These settings are saved with the system, not
with the session.
Control-click (Mac) or Start-click (Windows) to select multiple Inputs or Outputs. Command-Option-click (Mac) or
Control-Alt-click to cascade all Input or
Output settings.
S/PDIF
Optical (S/PDIF)
Two channels of S/PDIF (coaxial) input.
Two channels of S/PDIF (optical)
input up to 96 kHz. This option is not available at
sample rates higher than 96 kHz.
S/PDIF Format
For S/PDIF (Sony/Phillips Digital Interface Format) compatibility with Tascam DA-30 DAT recorders, select the
Tascam
option under S/PDIF
Format.
Chapter 4: Configuring Pro Tools | HD I/O in Pro Tools | HD Software25
Ext. Clock Output
If you want to send clock output to other devices
attached to HD I/O, select the appropriate output
from the
Ext. Clock Output
pop-up menu.
The available options for
Ext. Clock Output
change
depending on the session sample rate. See the table
below for a list of default external clock settings
and available options.
Ext. Clock Output options by sample rate
Sample Rate
44.1 kHzWord Clock
48 kHzWord Clock
88.2 kHzWord Clock
96 kHzWord Clock
176.4 kHzWord Clock
192 kHzWord Clock
Available Ext.
Clock Default
(44.1 kHz)
(48 kHz)
(88.2 kHz)
(96 kHz)
(176.4 kHz)
(192 kHz)
Available Ext.
Clock Option
N/A
N/A
Word Clock
(44.1 kHz)
Word Clock
(48 kHz)
Word Clock
(44.1 kHz)
Word Clock
(48 kHz)
Analog In Page
Hardware Setup, Analog In page
Reference Level
Select the appropriate
Reference Level
for each of
the available analog input channels. This lets you
select the analog audio input source on a channelby-channel basis. The
+4 dBu
option routes audio
from the physical +4 dBu Balanced DB-25 Analog
Input port on the card. The
–10 dBV
option routes
audio from the physical –10 dBV Balanced DB-25
Analog Input port on the card.
+4 dBu and –10 dBV DB-25 Analog Input ports
Limiter
The Analog In page of the Hardware Setup dialog
lets you set the Reference Level for the physical
analog inputs on HD I/O. You can also apply a limiter to each of the available analog inputs.
If you have only a single HD I/O AD Expansion
card installed, a single
Analog In
tab is available. If
you have two HD I/O AD Expansion cards installed, the tabs
available. The
log 9–16
pages provide the same controls for the
Analog 1–8
Analog In
and
, and
Analog 9–16
Analog 1–8
corresponding physical inputs on the HD I/O AD
card. If no HD I/O AD Expansion card is installed,
these tabs are not available.
Pro Tools | HD I/O Guide26
and
are
Ana-
HD I/O provides options for soft limiting on each
of the available analog input channels. Select the
desired option from the corresponding
Limiter
pop-
up menu:
None
Applies no limiting to the incoming analog
signal.
Soft Clip
Attenuates the incoming analog signal,
providing extra protection from temporary clipping transients that can cause digital distortion
when they exceed the maximum input of the unit.
With Soft Clip enabled, HD I/O supports an additional 4 dB of headroom by rounding off the top
4 dB to the clip point. This is useful for eliminating
stray transients.
Curv
Attenuates the incoming analog signal using
a soft knee limiter circuit. This guarantees super
soft limiting without becoming hard, even with
large overloads on input.
Digital Page
The Digital page of the Hardware Setup dialog lets
you set the
sion
Input Format
for any Digital I/O cards installed in HD I/O.
If you have only a single Digital I/O card installed,
a single
Digital
tab is available. If you have two HD
I/O Digital Expansion cards installed, the tabs
and
ital 1–8
Digital 9–16
(one Digital card), or the
(two Digital cards) pages all provide the
9–16
same controls for the corresponding physical inputs on the HD I/O Digital card. If no HD I/O Digital Expansion card is installed, these tabs are not
available.
and
Sample Rate Conver-
are available. The
Digital 1–8
and
Dig-
Digital
Digital
Digital Format
Select from the following digital formats for the
HD I/O Digital card. Depending on the sample
rate, different Digital Format options are available.
HD I/O Hardware Setup, Digital Format options at
44.1 kHz
HD I/O Hardware Setup, Digital Format options at
96 kHz
HD I/O Hardware Setup, Digital page
At session sample rates above 48 kHz, sample
rate conversion for the TDIF and Optical
(ADAT) inputs on the HD I/O Digital card is
automatically enabled on all eight inputs of
the selected format—unless you are using
Optical (ADAT S/MUX).
HD I/O Hardware Setup, Digital Format options at
192 kHz
Chapter 4: Configuring Pro Tools | HD I/O in Pro Tools | HD Software27
AES/EBU
You can select up to eight channels of AES/EBU
input depending on the sample rate. At sample
rates of 44.1 kHz to 96 kHz, the only option available is
AES/EBU 1–8
(or
AES/EBU 9–16
for the
second card, if present). At sample rates of
176.4 kHz and 192 kHz, two AES/EBU options
are available (Single Wire and Dual Wire modes).
AES/EBU 1–8
Enable this option for eight channels of AES/EBU input. This is the only option
available at sample rates of 44.1 kHz to 96 kHz.
This option is not available at higher sample rates.
AES/EBU 1–8 (Single Wire)
Enable this option for
eight channels of AES/EBU input. Sample Rate
Conversion is available for stereo pairs when Single Wire mode is selected. This option only appears at sample rates of 176.4 kHz and 192 kHz.
AES/EBU 1–4 (Dual Wire)
Enable this option for
four channels of AES/EBU input at sample rates of
176.4 kHz and 192 kHz. Sample Rate Conversion
is not available in Dual Wire mode. This option
only appears at sample rates of 176.4 kHz and
192 kHz.
1–8 (SRC)
Enable this option for eight channels of
ADAT input with automatic Sample Rate Conversion (SRC). This option only appears at sample
rates of 88.2 kHz and higher. This option is not
available at 44.1 kHz and 48 kHz.
1–4 (S/MUX)
Enable this option for four channels
of ADAT input with S/MUX (sample multiplexing). This option only appears at sample rates of
88.2 kHz and 96 kHz.
1–2 (S/MUX)
Enable this option for two channels
of ADAT input with S/MUX (sample multiplexing). This option only appears at sample rates of
176.4 kHz and 192 kHz.
TDIF
Depending on the sample rate, you can select eight
channels of TDIF (Tascam Digital Input Format)
input—
TDIF 1–8
, or
TDIF 9–16
for the second
card, if present—with or without automatic Sample Rate Conversion (SRC).
TDIF 1–8
Enable this option for eight channels of
TDIF input. This option is only available at sample
rates of 44.1 kHz and 48 kHz.
ADAT
You can select up to eight channels of ADAT input
depending on the sample rate. At 44.1 kHz and
48 kHz, the only option available is
ADAT 9–16
for the second card, if present). At
ADAT 1–8
(or
sample rates of 88.2 kHz and higher, two ADAT
options are available (SRC and S/MUX).
ADAT 1–8
Enable this option for eight channels of
ADAT input. This is the only option available at
sample rates of 44.1 kHz and 48 kHz. This option
is not available at higher sample rates.
Pro Tools | HD I/O Guide28
1–8 (SRC)
Enable this option for eight channels of
TDIF input with automatic Sample Rate Conversion. This option is only available at sample rates
of 88.2 kHz and higher.
Sample Rate Conversion
ADAT
Sample Rate Conversion
(SRC) is independently
available for AES/EBU stereo input pairs at all
sample rates. When
Digital Format
is set to ADAT
or TDIF, SRC can only be enabled or disabled for
all channel inputs. Sample Rate Conversion on Input is only available for Digital I/O cards, it is not
available for the enclosed digital ports.
Digital outputs do
conversion.
Sample Rate Conversion adds latency to the
input signal, so you should usually disable
Sample Rate Conversion when it is not
needed.
At session sample rates above 48 kHz,
sample rate conversion for the TDIF and
Optical (ADAT) inputs on the Digital I/O
card is automatically enabled on all eight
inputs of the selected format—unless you
are using Optical (ADAT S/MUX).
not
support sample rate
For sample rates of 44.1 kHz and 48 kHz, when
Digital Format
is set to ADAT, Sample Rate Con-
version can be enabled or disabled for all inputs.
ADAT (SRC)
At sample rates higher than 48 kHz, with ADAT
(SRC) selected as the
Digital Format
, Sample Rate
Conversion is enabled automatically for all
input channels.
ADAT (S/MUX)
At sample rate higher than 48 kHz, with ADAT
(S/MUX) selected as the
Digital Format
, Sample
Rate Conversion can be enabled or disabled for all
input channels.
TDIF
For sample rates of 44.1 kHz and 48 kHz, when
Digital Format
is set to TDIF, Sample Rate Conver-
sion can be enabled or disabled for all inputs.
TDIF (SRC)
AES/EBU
When
Digital Format
is set to AES/EBU, SRC can
be enabled or disabled for each stereo input pairs at
sample rates of 44.1 kHz to 96 kHz, and at
176.4 kHz and 192 kHz in Single Wire mode.
Sample Rate Conversion is not available for
AES/EBU at 176.4 kHz and 192 kHz in Dual Wire
mode.
SRC enabled for AES/EBU Input channels 1–2 and
3–4 at a Sample Rate of 96 kHz
Chapter 4: Configuring Pro Tools | HD I/O in Pro Tools | HD Software29
At sample rates higher than 48 kHz, with TDIF
(SRC) selected as the
Digital Format
, Sample Rate
Conversion is enabled automatically for all
input channels.
Set To Default
The
Set To Default
factory defaults, except for the
ting in the Main page.
button sets all settings to the
Digital Format
set-
Using Input Trims
Input Trims
Input Trims
Consider the following when connecting a mixer:
If your mixer cannot handle more than 1.5V
(RMS) inputs at +4 dBu, then you should set the
HD I/O to operate at –10 dBV line level.
If your mixer can handle up to 15.5V (RMS) inputs, or has pads or attenuators on its inputs, then
you can use the +4 dBu setting on the HD I/O.
HD I/O is calibrated at the factory for 18 dB
headroom at the +4 dBu setting.
The Input Trims below the two DB-25 connectors
on the HD I/O AD Expansion card are used to store
a calibration settings for each channel. These adjustable Input Trims are for precisely calibrating
the adjustable headroom settings for each channel.
You can adjust each Input Trim by hand with a
small screwdriver.
About Input Operating Levels
Check the manufacturer’s documentation for your
mixer, power amplifier, or effects processor to see
if it operates more comfortably at line level, in
which case consider setting the HD I/O to operate
at –10 dBV line levels and adjusting the Input
Trims.
Most manuals contain device input specifications,
including whether or not there are pads or attenuators. Refer to the manufacturer’s documentation
for your mixer or power amplifier for more information.
If you want to switch the input levels of the
HD I/O from +4 dBu to –10 dBV, you can access these parameters on a channel-by-channel basis in the Hardware Setup dialog (see
“Hardware Setup” on page 21).
Pro Tools | HD I/O Guide30
Chapter 5: Adding or Removing I/O Cards
Pro Tools | HD I/O has four Expansion I/O bays
on the back of the unit. Depending on which version of HD I/O you purchased, one, two, or none of
these bays may be empty and available for additional I/O cards:
• 8 x 8 x 8: three bays are used and the fourth bay
is empty
• 16 x 16 Analog: all four bays are used
Removing an I/O Card
To remove an Expansion I/O card:
1
Power off and disconnect the HD I/O from your
system.
2
Make sure that the equipment is properly
grounded.
• 16 x 16 Digital: two bays are used and two are
empty
The Expansion I/O bays let you configure HD I/O
with any of the following Expansion I/O cards
(each sold separately) to increase the amount of
available I/O on the unit:
• HD I/O AD Expansion card
• HD I/O DA Expansion card
• HD I/O Digital Expansion card
It is important that you follow the guidelines in
this chapter to avoid damaging your HD I/O
or any of your I/O Expansion cards.
The factory-installed cards can be removed, if
needed, for servicing, or to swap out cards for different studio setups. If you remove any of the cards
from the HD I/O, the unit will continue to function
as long as at least one card is installed (albeit with
reduced I/O capabilities).
Legacy 192 I/O AD, DA, and Digital Option
cards are not supported with HD I/O. Any
attempt to install legacy 192 I/O cards will
void the warranty for your HD I/O.
Before handling any of the cards or internal
components of HD I/O, discharge any static
electricity by touching the outer casing of the
power supply.
3
Remove all of the small Phillips-head screws
around the edges of the top cover. Put the
screws in a safe place.
Removing the top cover screws
4
Lift off the top panel of the HD I/O and set it
aside.
Chapter 5: Adding or Removing I/O Cards31
5
Remove the screws on the back panel for the
I/O card you want to remove.
When you pull a card out, pay particular attention to keeping components on the surfaces of the card from bumping into any of
the internal components or the back panel
faceplate on the HD I/O.
8
Place the card in a static-free bag and keep it in
a safe place (if you are not sending it to Avid for
service).
9
Firmly grasp the 50-pin cable connector to the
HD I/O chassis and gently pull to remove it (be
sure to keep the cable in a safe place).
Removing the screws securing an I/O card
6
Holding the 50-pin cable which connects the
card to the HD I/O chassis firmly, gently pull
the cable connector from the card’s connector.
Removing the 50-pin cable connector from an I/O card
7
Gently remove the card, pulling it straight out
from the chassis.
10
If you have a cover for the empty expansion
bay, secure the cover over the empty bay with
the screws you removed from the I/O card.
11
Replace the top cover on the HD I/O.
12
Replace the original screws.
Hardware Setup Changes After
Removing a Card
In this case, the Hardware Setup dialog will reflect
the change to the installed I/O cards. The remaining inputs and outputs will function normally.
For example, if you remove the Analog Input card,
the Analog Input tab will disappear from the Hardware Setup dialog.
You will lose the configuration of any pairs of inputs or outputs that were assigned to the card being
removed.
Removing an I/O card from the HD I/O chassis
Pro Tools | HD I/O Guide32
Installing an Expansion I/O
Card
To install an Expansion I/O card:
1
Power off and disconnect the HD I/O from your
Pro Tools|HD system.
2
Make sure that the equipment is properly
grounded.
3
Remove all of the small Phillips-head screws
around the edges of the top cover. Put the
screws in a safe place.
4
Lift off the top of the HD I/O and set it aside.
5
If necessary, do one of the following:
• Remove the screws on the cover over the
empty bay where you want to install an Expansion card.
• Remove the currently installed I/O card that
you want to replace (see “Removing an I/O
Card” on page 31).
6
Look into the empty bay to locate the guide rails
for the card to slide in on.
7
Remove the Expansion I/O card that you want
to install from its static-free bag.
Before handling any of the cards or internal
components of HD I/O, discharge any static
electricity by touching the outer casing of the
power supply.
8
Slide the edges of the card into the guide rails on
each side of the bay.
Inserting the card into the guide rails for the empty bay
9
Gently push the card back into the bay, lifting
slightly to keep components underneath the
card from touching the back panel.
Guide rails along sides of empty bay
Lifting slightly while pushing the card back into the bay
Chapter 5: Adding or Removing I/O Cards33
10
Secure the I/O card to the back panel of the
HD I/O chassis with the same screws you removed from the either the empty bay cover or
from the I/O card you previously removed.
Securing the I/O card to the back panel of the HD I/O
11
Locate the raised ridge in the middle of the connector on one end of the 50-pin cable that connects the I/O card to the HD I/O chassis. This
ridge is only on one side of the connector, and
there is a matching groove on only one side of
the 50-pin connector on the chassis.
13
Locate the raised ridge in the middle of the connector on the other end of the 50-pin cable that
connects the I/O card to the HD I/O chassis.
This ridge is only on one side of the connector,
and there is a matching groove on only one side
of the 50-pin connector on the card.
14
Gently push the cable connector into the card’s
connector. The ridge on the cable connector
must line directly into the groove on the card
connector. Be very careful not to bend any of
the pins or to over-stress the card.
Pressing the 50-pin cable connector into the card
15
Replace the top cover on the HD I/O.
12
Gently push the cable connector into the chassis’ connector. The ridge on the cable connector
must line directly into the groove on the chassis
connector. Be very careful not to bend any of
the pins.
Connecting the 50-pin cable to the HD I/O chassis
Pro Tools | HD I/O Guide34
16
Replace the original screws.
17
Reconnect the HD I/O to your system.
18
Power on the HD I/O.
19
When you power on the unit, verify that the
LED ring around the power switch lights orange.
20
Start up the computer.
21
When you start the computer, verify that the
power ring turns from orange to green. (If this
does not occur, see “Troubleshooting” on
page 35.)
22
Launch Pro Tools.
23
Open the Hardware Setup dialog to confirm that
the new card is recognized:
• If you installed a Digital Expansion card, you
should see a new tab called “Digital 9–16.”
• If you installed an AD Expansion card, you
should see a new tab called “Analog In
9–16.”
24
If the new card does not appear in the Hardware
Setup dialog, power down, check the seating of
the card, and recheck the cable connections inside the HD I/O.
Hardware Setup Changes After Adding
a Card
Any additional inputs and outputs provided by the
new card will appear in the Hardware Setup dialog,
with the same controls and parameters as for the
original card of the same type.
Troubleshooting
If the power ring does not turn from orange to
green when you boot the computer, check the following:
• Make sure the DigiLink Mini cable is connected
to the Primary port on the back of the unit.
• Make sure that the 50-pin cables used to connect
the installed I/O cards to the chassis are firmly
connected.
For example, if you add an Analog Input card to
the original three cards, a second Analog Input tab
will appear in the Hardware Setup dialog. You can
route these new inputs (which will in this case be
called Analog Inputs 9–16) with the same controls
and parameters as the factory-installed version of
the card.
Whenever a card is added or removed from a
HD I/O, the routing in the Hardware Setup
dialog reverts to the default assignments. If
you have complex routing and or mirroring in
place, note the assignments and reassign the
inputs and outputs after the new card has
been properly identified.
Chapter 5: Adding or Removing I/O Cards35
Pro Tools | HD I/O Guide36
Chapter 6: Pinout Diagrams for the DB-25
MH2
CH1_COLD
CH1_HOT
CH2_GND
CH2_COLD
CH3_GND
CH3_HOT
CH3_COLD
CH4_GND
CH4_HOT
CH4_COLD
CH8_COLD
CH7_COLD
CH7_HOT
CH7_GND
CH6_COLD
CH6_HOT
CH6_GND
CH5_GND
CH5_HOT
CH5_COLD
CH8_GND
NC_1
CH1_GND
CH2_HOT
CH8_HOT
MH1
1
8
7
6
5
4
3
2
27
12
24
11
23
22
21
9
8
7
20
14
3
15
16
17
4
5
19
18
6
2
13
25
10
1
26
MH2
CH1_COLD
CH1_HOT
CH2_GND
CH2_COLD
CH3_GND
CH3_HOT
CH3_COLD
CH4_GND
CH4_HOT
CH4_COLD
CH8_COLD
CH7_COLD
CH7_HOT
CH7_GND
CH6_COLD
CH6_HOT
CH6_GND
CH5_GND
CH5_HOT
CH5_COLD
CH8_GND
NC_1
CH1_GND
CH2_HOT
CH8_HOT
MH1
1
8
7
6
5
4
3
2
27
12
24
11
23
22
21
9
8
7
20
14
3
15
16
17
4
5
19
18
6
2
13
25
10
1
26
Connectors
Analog Output DB-25Analog Input (+4 dBu) DB-25
Chapter 6: Pinout Diagrams for the DB-25 Connectors37
Analog Input (–10dBV) DB-25 AES/EBU DB-25
MH2
CH1_COLD
CH1_HOT
CH2_GND
CH2_COLD
CH3_GND
CH3_HOT
CH3_COLD
CH4_GND
CH4_HOT
CH4_COLD
CH8_COLD
CH7_COLD
CH7_HOT
CH7_GND
CH6_COLD
CH6_HOT
CH6_GND
CH5_GND
CH5_HOT
CH5_COLD
CH8_GND
NC_1
CH1_GND
CH2_HOT
CH8_HOT
MH1
1
8
7
6
5
4
3
2
27
12
24
11
23
22
21
9
8
7
20
14
3
15
16
17
4
5
19
18
6
2
13
25
10
1
26
MH2
CH12_RCV_COLD
CH12_RCV_HOT
CH34_RCV_GND
CH34_RCV_COLD
CH56_RCV_GND
CH56_RCV_HOT
CH56_RCV_COLD
CH78_RCV_GND
CH78_RCV_HOT
CH78_RCV_COLD
CH78_XMT_COLD
CH56_XMT_COLD
CH56_XMT_HOT
CH56_XMT_GND
CH34_XMT_COLD
CH34_XMT_HOT
CH34_XMT_GND
CH12_XMT_GND
CH12_XMT_HOT
CH12_XMT_COLD
CH78_XMT_GND
NC_1
CH12_RCV_GND
CH34_RCV_HOT
CH78_XMT_HOT
MH1
XMT
XMT
XMT
7-8
5-6
3-4
RCV
RCV
RCV
1-2
RCV
3-4
5-6
7-8
1-2
XMT
27
12
24
11
23
22
21
9
8
7
20
14
3
15
16
17
4
5
19
18
6
2
13
25
10
1
26
Pro Tools | HD I/O Guide38
TDIF DB-25
GND_AGND_A
GND_C
22PF22PF
GND_C
MH2
CH12_RCV_DATA
GND3
CH56_RCV_DATA
CH12_XMT_DATA
CH78_RCV_DATA
GND4
GND6
GND5
CH34_XMT_DATA
XMT_FS1
RCV_FS0
RCV_FS1
XMT_LRCK
RCV_LRCK
RCV_EMPHASIS
CH56_XMT_DATA
GND7
XMT_FS0
CH34_RCV_DATA
GND2
XMT_EMPHASIS
MH1
DB25F_RA_TDIF
GND1
CH78_XMT_DATA
GND8
GND9
7-8
CLK+CTRL
1-2
3-4
5-6
1-2
3-4
5-6
RCV DATAXMT DATA
RCV
CLK+CTRL
XMT
7-8
GND_C
27
13
23
11
1
10
22
15
14
2
19
20
8
5
9
21
3
16
6
12
24
18
26
25
4
17
7
NC=
NC=
NC=
FB30FB31
Chapter 6: Pinout Diagrams for the DB-25 Connectors39
Pro Tools | HD I/O Guide40
Chapter 7: HD I/O Calibration Mode
Instructions
Before you use Pro Tools | HD I/O, you may want
to calibrate its input and output levels to the level
of your mixing console.
The HD I/O has +4 dBu and –10 dBV inputs, and
+4 dBu outputs, each with its own trim pot for
proper calibration.
The HD I/O is factory-calibrated so that its +4 dBu
input operating level is set for 18 dB headroom
above +4 dBu (maximum input/output +22 dBu).
If you need to recalibrate your HD I/O or other
components of your studio, you can use the alignment procedure described in this chapter.
About Calibration
Calibrating levels on a digital recording device is
different from calibrating levels on an analog recording device. Unlike analog devices, most digital devices do not have a standard “0 VU” level
setting that corresponds to nominal input and output levels. Instead, with an interface such as the
HD I/O, the meters are calibrated in decibels below peak or dBFS (dB full scale)—digital clipping
level.
Headroom
The concept of headroom is slightly different for
analog and digital devices.
Analog
amount of headroom above 0 VU. If you send a
signal above 0 VU to an analog recorder, you still
have a margin of headroom, and if tape saturation
occurs, it does so fairly gracefully, giving the audio a compressed sound that some find desirable.
Digital
exceed the dynamic range of the input or dBFS (dB
full scale). When a signal exceeds the maximum
input level for a digital device, clipping occurs,
causing digital distortion, which is harsh and usually undesirable.
Most analog devices allow for a certain
Digital devices do not allow for signals that
The Calibration Process
Analog
device to a mixing console’s output level, you
would typically send a 1 kHz tone at 0 VU from
the console to the analog deck and align the recording deck’s meters to read 0 VU.
Digital
HD I/O, in order to allow for headroom, you must
align a 0 VU tone from the console to a value less
than zero (or below dB full scale [–x dBFS]) on
the HD I/O, by exactly the amount of headroom
that you want.
To calibrate the input level of an analog
With a digital recording device such as the
Chapter 7: HD I/O Calibration Mode Instructions41
For example, to have 12 dB of headroom above
0 VU with the HD I/O, you must align the incoming 0 VU 1kHz tone to a level of –12 dBFS. For
18 dB of headroom, you would align it to
–18 dBFS. (Since it is assumed that you are using
the HD I/O with a +4 dBu device or console, a
0 VU signal level coming out of the device or console is actually equivalent to a nominal +4 dBu
level signal.)
Calibrating the HD I/O
To calibrate your HD I/O, use one of the HD I/O
calibration sessions included with Pro Tools (located in the Pro Tools Utilities/Calibration Mode
Session/HD IO Calibration Session folder). You
can use these sessions as is and change the input
and output assignments for more HD I/O channels
or use it as a template to make your own calibration
session.
The following instructions show how to create a
calibration session from scratch.
If your system includes one or more EUCON
controllers, be sure to disable “Auto-bank to
selected track” in EuControl software before
enabling Pro Tools Calibration Mode to ensure that faders remain silent. To make sure
“Auto-bank to select track” is not enabled,
open the EuControl Settings window, click to
go to the General tab, and verify the setting is
not enabled. If necessary, click to disable
“Auto-bank to selected track.” After exiting
Calibration Mode, be sure to re-enable the
“Auto-bank to selected track” setting (if necessary).
To create a session for calibrating your HD I/O:
1
Launch Pro Tools and create a new session.
2
Choose
eration
3
Enter the desired Calibration Reference Level
Setup > Preferences
tab.
and click the
value in dB. A level of –18 dB is typical. (It is
not necessary to type a minus sign here.)
4
Click OK.
5
Create a new mono audio track by choosing
Track > New
6
Insert the Signal Generator plug-in on the track.
7
Set the Signal Generator plug-in output level.
.
This should be the same value you entered as
the Calibration Reference Level (such as
–18 dB).
8
Set the Signal Generator frequency to 1000 Hz.
1000 Hz is typical, but any frequency will work.
Other typical values are 250 Hz and 500 Hz.
9
Set the Signal Generator signal waveform to
Sine.
10
Route the track’s output to Bus 1. In the calibration template, Bus 1 has been renamed to “1k
Tone.”
11
Create a mono Auxiliary Input track for each
HD I/O output you want to calibrate. Set the
output assignment for each of these Auxiliary
Inputs to its respective I/O output.
12
Set the input of each Auxiliary Input track to
Bus 1, or 1k Tone for the template session.
Op-
Turn down your monitoring system before
beginning calibration. The Signal Generator
plug-in emits a continuous signal when inserted on a track.
Pro Tools | HD I/O Guide42
13
Create an additional mono Auxiliary Input track
for each input you want to calibrate. Set the input assignment for each of these Auxiliary Inputs to its respective I/O input. Then set the
output of each of these Auxiliary Inputs to an
unused bus pair (for example Bus 3–4). In the
template session the bus names are Null and
Out. This makes sure feedback doesn’t occur
when monitoring main outputs 1–2.
14
Connect an external VU meter to each of the I/O
outputs in turn. (One at a time as you calibrate.)
15
Set all Pro Tools track faders to their default of
0 dB by Option-clicking (Mac) or Alt-clicking
(Windows) any fader.
16
Adjust the I/O output level trim pot with a
small, flat-head screwdriver to align the outputs
to read “0 VU” on the external VU meter. We
recommend using a tweaker tool with a recessed flat-head surrounded by a plastic tube to
hold the trim pot. Tweakers can usually be
found at electronic supply stores.
3
Adjust the HD I/O input level trim pots with the
same small flat-head screwdriver or tweaker. It
is best to calibrate the inputs with the back of
the HD I/O facing you and the Pro Tools screen
well in sight. If you cannot see the Pro Tools
screen, consider asking another person to assist
you with the input calibration. When the level is
properly matched, the track name will stop
flashing and the peak volume indicator will indicate your headroom value (the default is
“–18.0”).
The Automatch indicator arrows on each track
show the direction of adjustment required for
alignment:
• When the incoming level is higher than the
reference level, the down arrow will appear
lit (blue). In this case, trim the I/O input level
down.
• When the incoming level is lower than the
reference level the up arrow will appear lit
(red). In this case, trim the I/O input level up.
To calibrate the HD I/O inputs:
1
Connect the HD I/O outputs to a bank of
HD I/O inputs by doing either of the following:
• Use a DB-25 to DB-25 straight through cable.
• Interconnect the XLR ends of DB-25-to-XLR
together.
2
In Pro Tools, select
Options > Calibration Mode
The names of all uncalibrated tracks begin to flash.
In addition, the track volume indicator of each
Auxiliary Input track receiving an external input
signal now displays the reference level coming
from the calibrated output (default is –18 dB).
When you have properly aligned the incoming
peak signal levels to match the calibration reference level, both Automatch indicator arrows will
light: the up arrow red and the down arrow blue.
Above the fader is a peak volume indicator. This
indicator will show the dB level above and below
your chosen headroom value. If the peak indicator
is showing –19.1, you are –1.1 dB below a head-
.
room value of –18 dB. If the display is showing
–16.5, you are +1.5 dB above your headroom value
of –18 dB.
4
When you have finished, deselect
Calibration Mode
.
Options >
Chapter 7: HD I/O Calibration Mode Instructions43
Switching Jumpers on the
Analog Output Card
Each Analog Output card for HD I/O provides a
jumper for each of the eight channels of output on
the card to switch between a Hi and Lo output setting. The default setting for each jumper is Hi. This
is what you want for working with professional
gear that operates at +4 dBu levels.
However, if you are working with –10 dBV gear,
you can switch the jumper on Analog Output card
(on a channel-by-channel basis) from the default
Hi position to Lo for a –6 dB pad. You can then adjust the Trim pot for the corresponding output
channels by an additional –4 dB to accommodate
–10 dBV gear.
To switch the jumpers for output channels on an
Output card:
1
Remove the Output card from the HD I/O chassis (as described in Chapter 5, “Adding or Removing I/O Cards”).
2
Place the card on a stable, static free surface.
3
Using tweezers or a pair of needle nose pliers,
gently remove the jumper for each output channel that you want to modify.
4
Gently, but firmly, replace the jumper in the
position that you want for Hi or Lo output:
Pin orientation on Output card
5
Replace the Output card in the HD I/O chassis
(as described in Chapter 5, “Adding or Removing I/O Cards”).
• Place the jumper so that it connects the middle pin and the back pin (furthest from the
DB-25 connector) for the Hi setting (this is
the factory default setting).
• Place the jumper so that it connects the middle pin and the front pin (closest to the DB-25
connector) for the Lo setting (–6 dB pad).
Pro Tools | HD I/O Guide44
第
章はじめに
1
Pro Tools® | HD I/O
ProTools®|HDNative
Pro Tools® | HD
Disposal of Waste Equipment by Users
in the European Union
This symbol on the product or its packaging indicates that this
product must not be disposed of with other waste. Instead, it
is your responsibility to dispose of your waste equipment by
handing it over to a designated collection point for the recycling
of waste electrical and electronic equipment. The separate
collection and recycling of your waste equipment at the time of
disposal will help conserve natural resources and ensure that
it is recycled in a manner that protects human health and the
environment. For more information about where you can drop
off your waste equipment for recycling, please contact your
local city recycling office or the dealer from whom you purchased
the product.
This product contains chemicals, including lead,
known to the State of California to cause cancer
and birth defects or other reproductive harm.
Wash hands after handling.
Perchlorate Notice
This product may contain a lithium coin battery. The State of
California requires the following disclosure statement: “Perchlorate
Material – special handling may apply, See
www.dtsc.ca.gov/hazardouswaste/perchlorate.”
Recycling Notice
Appendix A: Compliance Information95
EMC (Electromagnetic
Compliance)
Avid declares that this product complies with the following standards
regulating emissions and immunity:
• FCC Part 15 Class A
• EN55103-1 E4
• EN55103-2 E4
• AS/NZS CISPR 22 Class A
• CISPR 22 Class A
FCC Compliance for United States
Communication Statement
Note: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment
is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Any modifications to the unit, unless expressly approved by Avid,
could void the user's authority to operate the equipment.
Australia and New Zealand EMC
Regulations
Canadian Compliance
This Class A digital apparatus meets all requirements of the
Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe A respecte toutes les
exigences du Règlement sur le material brouilleur du Canada.
European Union Declaration of
Conformity
(EMC and Safety)
Avid is authorized to apply the CE (Conformité Europénne) mark
on this compliant equipment thereby declaring conformity to EMC
Directive 2004/108/EC and Low Voltage Directive 2006/95/EC.
Argentina Conformity
Korean EMC Regulations
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Pro Tools | HD I/O Guide96
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