Ambiance Extraction

Ambiance Extraction Used in some home-based surround-sound processors, it basically involves removing outof-phase information from a two-channel soundtrack and converting it for use in the surround channels. In the early 1960s, David Hafler developed one of the original extraction systems, a passive, unamplified hookup for a group of four loudspeakers hooked up to a two-channel amplifier, which steered out-of-phase components in a stereo recording to a set of rear loudspeakers, which were…