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Birmingham ElectroAcoustic Sound Theatre, or as it is more commonly known, BEAST, is a sound diffusion system specifically designed for the performance of electroacoustic music. Created in 1982, it is a long-running project of the Electroacoustic Music Studios at the University of Birmingham under the directorship of Jonty Harrison. Simply put, it consists of a set of loudspeakers connected to a diffusion console. ==The loudspeakers== BEAST can consist of up to over 100 channels of loudspeakers arranged in pairs, or more recently to allow the diffusion of octaphonic works, circles of eight, and includes ultra-low frequency loudspeakers (''bins'') and custom-built trees of high frequency speakers (''tweeter trees'') which can be suspended above an audience. The minimum set-up that BEAST would ordinarily use for stereo diffusion comprises a set of loudspeakers which Jonty Harrison terms the ''Main Eight''.〔 〕〔 〕 These four pairs of loudspeakers, using BEAST nomenclature, are termed ''Main'', ''Wide'', ''Distant'' and ''Rear''. The ''Main'' and the ''Wide'' speakers together form the main, frontal sound image, the ''Main'' speakers being placed to act somewhat like the loudspeakers in a typical studio, and the ''Wide'' speakers acting to stretch that sound image out across the audience's sound stage. The ''Rear'' speakers, which are behind the audience, provide immersion and the possibility of movement around the audience. Finally, the ''Distant'' speakers, which are positioned to hold their image behind the ''Main'' speakers, create a sound whose perspective is distant to that of the ''Main'' pair. Other speakers are added to this ''Main Eight'' to allow additional possibilities for sound movement and differing sound perspectives. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Birmingham ElectroAcoustic Sound Theatre」の詳細全文を読む スポンサード リンク
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