The Apogee products have set the standard of quality digital audio recording, and Symphony I / O is the culmination of over 25 years of experience in designing high quality audio equipment. Symphony I / O is a multi-channel audio interface designed to deliver the highest quality to Mac-based audio recording workstations and is characterized by a quality ever achieved so far, a totally flexible I / O system and compatibility with The most used DAW software. The Symphony 8x8 Analog + 8x8 AES / Optical I / O Module adds 8 analogue input and output channels to your Apogee Symphony I / O on two 25-pin D-sub connectors: one for input and one for input, Output, each with 8 balanced channels. A third 25-pin D-Sub connector provides 8 digital AES / EBU I / O channels. You can also configure the connector in a single 192kHz format. You can switch between IAs and optical ports that support 8 channels ADAT 44.1-48kHz, 8 S / MUX 88.2-96kHz channels, or 2 S / PDIF channels up to 96kHz. As if that was not enough, there are also 2 S / PDIF coax I / O channels (up to 192kHz) on RCA.