Patent ID: 6219426
Filing Date: 2001-04-17
Classification: H04R

Abstract:
A method for creating three dimensional embellished musical sound images originating from a live performance of a musical instrument wherein the sound images are formed by aural combination of sound emanating from two dissimilar loudspeaker units co-located in a listening environment at a center point of a CPS system, i.e. a center point stereo system, comprising the steps of:a) performing music on the musical instrument so as to generate a real-time multi-component electrical source signal representing the performed music;b) processing the source signal in a manner to generate therefrom (1) a sum signal representing a sum of two selected component portions of the source signal and (2) a difference signal representing difference between the two selected component portions of the source signal;c) amplifying the sum signal in a first power amplifier so as to provide a power-amplified sum signal;d) amplifying the difference signal in a second power amplifier so as to provide a power-amplified difference signal;e) applying the power-amplified sum signal to a forward-directed loudspeaker unit, located at the center point, constructed, arranged and oriented to emanate a sum sound field in a unidirectional pattern predominantly in a forward direction toward an audience region of the listening environment;f) applying the power-amplified difference signal to a sideways-directed dipole loudspeaker unit, co-located generally at the center point along with the forward-directed loudspeaker unit, said dipole loudspeaker unit being constructed, arranged and oriented to emanate a difference sound field in a dipole pattern having two oppositely-polarized lobes directed substantially in opposite side directions perpendicular to the forward direction;whereby a sum sound field reaching a listener in the audience region via a predominantly direct path and a difference sound field reaching the listener via a predominantly reflected path are caused to combine aurally such that the listener is caused to perceive stereophonic images representing the performed music spread panoramically left and right of the common central loudspeaker location.