Apogee Symphony I/O Module A2X6, expansion card for the Apogee Symphony system, Analog Inputs: 2 balanced inputs on 2 female XLR connectors, Digital Inputs: AES IN: Stereo input on 1 female XLR connector, Optical IN: Supports ADAT, SMUX & S/PDIF, ADAT: 8 channels 44.1-48 kHz on 1 Toslink connector, SMUX: 4 channels 88.2-96 kHz on 1 Toslink connector, S/PDIF: 2 channels, up to 96 kHz on 1 Toslink connector, S/PDIF Coax IN: 2 channels, up to 192 kHz on 1 RCA connector, Outputs: Analog Outputs: 6 balanced outputs on 1 DSUB 25-pin connector, Digital Outputs: AES OUT: Stereo output on 1 male XLR connector, Optical OUT: Supports ADAT, SMUX & S/PDIF, ADAT: 8 channels 44.1-48 kHz on 1 Toslink connector, SMUX: 4 channels 88.2-96 kHz on 1 Toslink connector, S/PDIF: 2 channels, up to 96 kHz on 1 Toslink connector, S/PDIF Coax OUT: 2 channels, up to 192 kHz on 1 RCA connector