The Focusrite Scarlett 18i20, a USB audio interface for Mac and PC, is the flagship of the acclaimed Scarlett interface series. It features eight balanced line inputs for connecting synthesizers or other line-level audio sources and ten balanced outputs. In addition, it features a digital stereo input an microphone preamps with switchable 48V phantom power, as well as the brand-new Air Mode. Electric guitars and basses can also plugged in directly, since the impedance of the two front sockets can be set to Hi-Z. The Scarlett 18i20 also looks great and is very attractively priced. An audio interface provides a connection between a computer and various external devices. The computer in turn requires special software in order to process the incoming signals. Focusrite offers a selection of software you can use to get started,