An audio enhancement system and method for use receives a group of multi-channel audio signals and provides a simulated surround sound environment through playback of only two output signals. The multi-channel audio signals comprise a pair of front signals intended for playback from a forward sound stage...http://www.google.de/patents/US5912976?utm_source=gb-gplus-sharePatent US5912976 - Multi-channel audio enhancement system for use in recording and playback and methods for providing same
