System of recording and reproduction using four channels and four loudspeakers in an attempt to recreate a 360 degrees sound field around the listener.
"I just wanted to say how impressed I was with your service. I had you convert a Laser Disc, to a DVD. I am very happy with the whole process. You were 'Rocket' fast with the conversion, and the shipping. I am from clear across the country, and you had it back to me remarkably fast and well packaged, taking great care of my origianal Laser ..."