Apogee Symphony I/O 8/8 + 8MP, modular audio recording interface, 8 analog Inputs Sub D-25 + 8 analog Outputs Sub D-25, S/PDIF coaxial/optical I/O, ADAT I/O, AES I/O, 8 built-in mic preamps, 4 Hi-Z 1/4" instrument inputs, dual multi-function encoder knobs, GUI display for adjustment of function parameters, assignable 10-segment peak metering for 16x channels, 7-segment sample rate display, 2x independent 1/4" headphone outputs, PCI, USB and ethernet connectivity, temperature controlled fan, Digidesign Pro Tools HD PCI direct connection, word clock I/O. Dimensions: 19"/2U (removable rack ears). Requires Mac OS X 10.58 or higher.