The Apogee Symphony I/O MkII chassis (Pro Tools HD) is a multi-channel audio interface featuring Apogee's latest flagship AD/DA conversion, modular inputs and outputs (up to 32x inputs and outputs), intuitive touchscreen display, and optional top-of-the-line mic preamps. Designed to deliver professional sound quality for audio recording, mixing and mastering, Symphony I/O Mk II is the ultimate music production centerpiece for any modern studio. With 2x module slots and a capacity of up to 32x A/D and D/A conversion per unit, Symphony I/O MkII offers the best value per channel among all interfaces in its category.