Digital optical output provides a multichannel, pure digital, distortion-free signal that can be connected via a single optical digital cable thus eliminating multiple cable connections and ensuring high fidelity audio for your home theater experience. Includes AUDACITY: A multi-track recording/editing studio Audacity can record live audio through a variety of sources, such as a microphone, or line in on the Xtreme Sound card. Level meters help monitor volume levels before, during, and after recording. You can dub over existing tracks to create multi-track recordings. You can Import sound files, edit them, and combine them with other files or with new recordings. Export your recordings in several common file formats, such as WAV and MP3.