Get the absolute highest audio quality and unprecedented I/O flexibility with Avid HD I/O, a high-performance Pro Tools HD Series audio interface that’s designed to completely integrate with Pro Tools|HD systems.  While its sleek look resembles its prior generation interfaces, HD I/O has been completely redesigned on the inside with high-quality electronics, giving you pristine, best-in-class A/D and D/A conversion and the lowest possible latency.Features: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 designAdapt the interface for your needs—choose from three configurations:Get a balance of analog and digital I/O with HD I/O 8x8x8Versatile digital I/O on all interfaces, with built-in sample rate conversionExpand or customize the I/O with analog or digital option cardsCompletely integrates with Pro Tools|HD for full input, output, and routing controlTrack hotter signals and smooth out sounds with Curv, a new built-in soft-knee limiterKeep things in sync with dedicated Word Clock and Loop Sync I/OKeep an eye on your levels easily through 32 4-segment metering LEDsRobust 2U rack-mountable chassisConnects to Pro Tools|HD through a DigiLink Mini connection (cable and adaptor included)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.HD I/O 8x8x8
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/O8 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 single-wire)2 channels of S/PDIF I/O8 channels of ADAT I/O (supports S/MUX II and IV)One empty bay for I/O expansion