Avid Pro Tools HD I/O 8x8x8 Audio Interface (Analog & Digital)

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  • Avid Pro Tools HD I/O 8x8x8 Audio Interface (Analog & Digital)
  • Avid Pro Tools HD I/O 8x8x8 Audio Interface (Analog & Digital)


What is Pro Tools | HD Series Interface?

Capture and play back audio in stunning clarity and easily work with a wide range of analog and digital gear. Whether you want to streamline your setup with an all-in-one interface, provide mic or MADI connectivity, or need a tightly integrated, flexible system that can handle complex productions with up to 64 channels of I/O, there’s a Pro Tools | HD Series interface that’s right for you—choose one or more to complete your system and customize it for your needs.

HD I/O is a high-performance Pro Tools | HD Series audio interface that’s designed to completely integrate with Pro Tools | HD systems. The interface features premium A/D and D/A conversion and advanced circuitry, giving you pristine sound quality and clarity and the lowest possible latency. Plus, with three configurations to choose from and a modular design, you can expand and customize the interface for your connection needs.

Whether you work with music or sound for picture, HD I/O gives you professional-grade audio quality, high performance conversion, and the flexibility to integrate with a variety analog and digital gear, so you can quickly adapt the interface to meet whatever need comes your way.

The HD I/O 8x8x8 Interface

The perfect choice when you need a balance of analog and digital I/O for your music or post-production projects, with the option to expand your I/O.

High-quality analog I/O

  • 8 analog inputs (using DB25)
  • 8 analog outputs (using DB25)

Versatile digital I/O

  • 8 channels of AES/EBU I/O (supports 192 kHz single-wire and dual-wire)
  • 8 channels of TDIF I/O
  • 8 channels of ADAT I/O (supports S/MUX II and IV)

Additional digital I/O

  • 2 channels of AES/EBU I/O (supports 192 kHz singlewire)
  • 2 channels of S/PDIF I/O
  • 8 channels of ADAT I/O (supports S/MUX II and IV)

One empty bay for I/O expansion

Hear What You’ve Been Missing

A sonic improvement over its audio interface predecessors, HD I/O features premium A/D and D/A conversion, so you can achieve higher audio fidelity, extensive dynamic range, super-low jitter, and the absolute lowest possible latency in your sessions. With certain configurations, you also get built-in sample rate conversion and a soft clip feature for worry-free recording. And using Curv, a new built-in soft-knee limiter that catches even the fastest transients, you can track hotter signals and smooth out inconsistent levels from incoming sources.

The Ultimate in Interface Flexibility

As your needs grow or change, you can easily add more analog inputs, analog outputs, or digital I/O by installing an option card. You can install one option card in HD I/O 8x8x8 and up to two in HD I/O 16x16 Digital. While HD I/O 16x16 Analog comes with the maximum four cards, you can customize your I/O by swapping out any card.

  • HD I/O AD Option: Adds 8 high-fidelity analog inputs (using DB25)
  • HD I/O DA Option: Adds 8 high-fidelity analog outputs (using DB25)
  • HD I/O Digital Option: Adds 8 channels each of AES/EBU (supports 192 kHz single-wire and dualwire), TDIF, and ADAT (supports S/MUX II and IV) I/O

Work with Pro Tools and More

HD I/O and all other HD Series interfaces completely integrate with Pro Tools | HD systems, so you get maximum performance, dependability, and control of your inputs, outputs, and routing right from your Pro Tools | HD Software interface. You'll also get higher production quality and greater workflow flexibility than with previous Pro Tools interfaces. And if you want to use your interface with Pro Tools | HD hardware and other DAW software, you can do that too, as all Pro Tools | HD systems support Core Audio and ASIO drivers.


  • Pristine audio clarity and ultra low latency through state-of-the-art A/D and D/A conversion, premium analog circuitry, and meticulous attention to design
  • Adapt the interface for your needs—choose from three configurations:
  • Get a balance of analog and digital I/O with HD I/O 8x8x8
  • Maximize your analog I/O with HD I/O 16x16 Analog
  • Go all digital with HD I/O 16x16 Digital
  • Versatile digital I/O on all interfaces, with built-in sample rate conversion
  • Expand or customize the I/O with analog or digital option cards
  • Completely integrates with Pro Tools | HD family systems for full input, output, and routing control
  • Track hotter signals and smooth out sounds with Curv, a new built-in soft-knee limiter
  • Keep things in sync with dedicated Word Clock and Loop Sync I/O
  • Keep an eye on your levels easily through 32 4-segment metering LEDs
  • Robust 2U rack-mountable chassis
  • Connects to Pro Tools | HD family systems through a DigiLink Mini connection (cable and adaptor included)

What's Included

  • HD I/O 8x8x8 audio interface
  • AC power cable
  • DigiLink Mini cable (18 inches [0.46m])
  • DigiLink to DigiLink Mini adapter cable
  • BNC cable (18 inches [0.46m])
  • HD I/O Guide
  • Health and Safety Guide
  • Registration Information Card
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Analog inputs 8
Analog outputs 8
AES single-wire (192 kHz) Yes
S/PDIF I/O 1 In + 1 Out (coax or optical)
ADAT I/O 8 + 8
SRC 8 channels (digital card)
Word Clock I/O 1 In + 1 Out
Loop Sync I/O 1 In + 1 Out
Digital interface DigiLink Mini
Dynamic range ADC 122 dB
Dynamic range DAC 125 dB
THD+N ADC -114 dB (0.0002%)
THD+N DAC -110 dB (0.00032%)
Frequency response ADC 20 Hz – 20 kHz N/A (+/-.03 dB)
Frequency response DAC 20 Hz – 20 kHz N/A
Expansion 1 empty bay
Curv Yes
Soft clip Yes
Cal trims Yes
Metering 32 4-segment LEDs
Internal fan Yes
Chassis 2U rack-mountable

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