Yamaha Matrix Processor Matrix processor equipped with a variety of programmable features designed to maximize the performance of sound systems in commercial installations. Easy setup and parameter control with MTX Editor Equipped with Network port and GPI ports that offer compatibility with touch panel controllers such as AMX/Crestron Wireless DCP for iPhone and iPod touch is free available on the App Store Remotely control the volume and presets of multiple zones with DCP series wall mount digital controllers Two useful digital processors "Reverb" and "Echo" for entertainment applications SD Card Slot for playback of MP3/WAV files stored on an SD Memory Card Functions for worry-free operation; Feedback Suppressor, Auto Gain Control, Priority Ducker and Dugan Automixer Can expand YDIF equipped inputs and outputs with Exi8/Exo8 expanders Outputs; 8 mono (line), 16 digital (via YDIF*) Inputs; 8 mono (mic/line), 2 stereo (line), 16digital (via YDIF*)