Perfect for a small live-performance mixer, as well as home-based recording setup, the 1204USB provides four mono channels with premium XENYX mic preamps, neo-classic 3 band British style EQ and two stereo input channels. Far from being a 'bare-bones' mixer, all mono channels feature our 'one knob' studio grade compressor and two Aux Sends (one each pre- and post-fader). Two stereo Aux Returns are included for use with external FX modules. The built-in USB audio interface provides bi-directional transfer of signals between the mixer and computer.