The enjoyment of music reproduction can be significantly increased by augmenting the reproduction with the early reflections characteristic of appropriate listening spaces. The early reflection patterns are obtained from a sophisticated computer analysis of the acoustics of a variety of performing spaces. The results of this analysis are stored in a special-purpose digital signal processor whose signal input is standard stereo recordings. Only the early reflections are synthesized because these sounds are excluded from stereo recordings. The later reflections which make up the reverberance are usually recorded, so no effort is made to recreate this portion of the reverberation. Two additional speakers are required, and they can be positioned anywhere within a large range. Careful consideration of the properties of auditory perception led to important simplifications. The system is simple to set up and operate, and provides music reproduction that seems much more natural.
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