AMBISONIC

It was not only quad's transmission method that was problematical. The approach to creating surround-sound itself was not entirely successful. Although we can pinpoint an audio image very accurately across a 60-degree soundstage in front of us, our hearing is far less accurate across a rear stage, and our ability to localize sounds to the side is even worse... Short history and description of the Ambisonic surround-sound system. Its performance as compared to 'quadraphonic' systems.