The 22.2 multichannel sound system was developed for adapting to ultrahigh-definition vide system with 4000 scanning lines. It consists of three layers of loudspeakers: the upper layer with 9 channels, the middle layer with 10 channels, and the lower layer with 3 channels and 2 channels for LFEs. It can reproduce a higher sensation of presence over a wider listening area than the conventional multichannel audio system. This system will be firstly introduced to the public at World Exposition 2005 in Japan. This paper describes the newest 22.2 multichannel system in the Super Hi-Vision Theater of World Exposition, and will discuss advantages of 22.2 multichannel sound. It will also describe the sound recordings and productions by 22.2 multichannel sound.
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