Add this 'AIM Option 6 - A16x16' module to your Symphony chassis to get an extra 16 channels of analog I/O (32 channels of I/O simultaneously). The I/O Modules are the sound and soul of Symphony I/O, and represent 25 years of Apogee R&D and design excellence. These powerful Modules deliver Apogee's core competency, superior sounding digital audio recording. With 5 available I/O Modules, you can choose from standard configurations or customise the following: channel count, analog to digital input, digital to analog output, mic preamps and digital I/O. You compose your Symphony I/O.