The result of a yearlong analysis by Holman became known as THX. (The name was probably derived from Lucas' first film, THX 1138, although some dubbed it the Tomlinson Holman eXperience.) THX is not, as is often believed, an audio delivery system like Dolby or DTS surround sound but rather a set of metrics governing such things as room reverberation, amplifier power, ambient noise and light, and d