Description Product Description Avid Hd I/o 16 X 16 Digital Interface  Get the absolute highest audio quality and unprecedented I/O flexibility with HD I/O, a high-performance Pro Tools HD Series audio interface thats 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. Plus, with three configurations to choose from and a modular design, you can expand and customize the interface for your connection needs.