A 22.2 multichannel sound system was developed that adapts to an ultrahigh-definition video system with 4000scanning lines. The sound system consisted of loudspeakers with three layers: an upper layer with nine channels, amiddle layer with ten channels, and a lower layer with three channels and two channels for low frequency effects.This system has new features of three-dimensional sound reproduction. Subjective evaluation by the semanticdifferential (SD) method are presented to assess the importance of height information for a sound system usingseveral stimuli in a 22.2 multichannel audio system with Super Hi-Vision and a high-definition television.Furthermore, the actual effectiveness of height information and some practical suggestions for aesthetic mixing ofthree-dimensional audio is also presented.
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