Audio-Technica ATDM-0604a Digital Automatic MixerThe ATDM 0604a automatic mixer is ideal for meetings, conferences, soft codec applications, courtroom proceedings, radio and TV broadcasts and other applications involving the use of multiple microphones or other media inputs. Audio Technica's SmartMixer technology allows channels to be mixed automatically in gate or gain sharing mode, ensuring consistent, high quality audio output from all inputs in a setup, without the introduction of feedback,