As the name suggests, the Focusrite Scarlett 18i8 features a combination of 18 inputs along with 8 outputs for a variety of formats. You've got two combination mic/DI inputs, two microphone preamps, four more line inputs along the back of the interface, 8 lines of ADAT optical input, and one stereo S/PDIF connection, bringing the total to 8 analog inputs and 10 digital inputs. Rounding off the outputs are two stereo headphone outs, two 1/4" monitor outputs, and a stereo S/PDIF output, along with MIDI I/O. If you're looking for a complete recording solution at musician-friendly prices, the Focusrite Scarlett 18i8 is truly the perfect interface.