The XENYX X1204USB/1204USB is a 12-channel audio mixer with an integrated USB computer audio interface.The X1204USB provides four mono channels and two stereo channels, making it ideal for smaller jobs. The built-in USB interface allows for a bi-directional transfer of audio to and from your computer. The energyXT2.5 software is compatible with Mac, Windows, and even Linux operating systems, and includes virtual keyboard instruments and drum machines.