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           Doug 
                Hollis (1976) - This piece is a large-scale wind harp mounted 
                on the roof of the Exploratorium. The sounds produced by the wind 
                blowing across the choir of strings are transmitted mechano-acoustically 
                to speakers near the entrance of the building. The harp is the 
                culmination of a series of investigations into the nature of resonating 
                strings and the ways in which this resonance can be transmitted 
                and amplified though non-electronic means.
          
          
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