The Symphony I/O 16x16 by Apogee is an 16 x 16 analog input/output digital audio converter. Consisting of the Symphony I/O Chassis and the A16x16 input/output module the unit provides any combination of 16 x 16 analog input and output. The I/O module also features two channels of coaxial S/PDIF input and output. The Symphony I/O Chassis provides two module slots for a variety of digital audio conversion options with one already being filled with the included module. The front panel of chassis presents the visual feedback needed to monitor levels sample rate and clock status along with the controls required to adjust gain and output levels.