This opera house of 1,828 seats boasts one of Europe`s largest stages and is highly reputed for its repertoire and acoustics. However, it presented a number of issues including poor communication between the singers and the orchestra pit, insufficient loudness of the upstage singers for the audience, a lack of reverberation when the house was occupied, and insufficient loudness at the seats under the balconies. For these reasons Active Field Control System (AFC) was adopted as a means to improve the acoustics while preserving the historic architecture of the opera house. This paper presents an overview of that system and the benefits achieved by its introduction.
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