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STEREO SYNTHESIZER

  • US 3,670,106 A
  • Filed: 04/06/1970
  • Issued: 06/13/1972
  • Est. Priority Date: 04/06/1970
  • Status: Expired due to Term
First Claim
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1. Stereo synthesizer apparatus for synthesizing a stereo output from a monophonic input comprising:

  • a source of monophonic sound signals, means directly connected to said monophonic source so as to form at least two separate sound channels for conveying said monophonic sound signals, electrical means connected in one of said channels providing a network transfer function for producing phase-delayed signals, according to which the degree of phase shift varies continuously and non-linearly with frequency, means, directly connected to said electrical means, for combining the input signals from said separate sound channels, including said phase-delayed signals, so as to produce at the output channels thereof, respectively, enhancement signals and opposition signals corresponding to the algebraic sum of the input signals and opposition signals corresponding to the algebraic difference between the input signals, and transducer means directly connected to said output channels of said means for combining so that the respective enhancement and opposition signals are reproduced by said transducer means.

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