The Symphony 16 input + 16 analog output module adds 16 full channels (input and output) to your Apogee Symphony I / O MKII. Analog input and output sections consist of four 25-pin D-Sub connectors, each with eight balanced channels. And as bonuses are also available, two S / PDIF digital I / O channels. You have a powerful converter with the Apogee Symphony I / O MKII, you can maximize its potential with the Symphony 16 Analog Input + 16 Analog Output module.