Patent ID: 7146010
Filing Date: 2006-12-05
Classification: H04R,H04S

Abstract:
1. A method of processing an input audio stereo signal comprising two input signals, which are a mid input signal (M) and a side input signal (S), or of a kind from which a mid input signal (M) and a side input signal (S) are derivable, for reproduction of a processed stereo signal in an audio reproduction system comprising at least one pair of identical loudspeaker elements being acoustically isolated from each other and located within less than one quarter of the shortest wavelength emitted by the elements, or, if the shortest wavelength emitted by the elements is less than 68 cm, then the loudspeaker elements are located less than 17 cm, characterised by the steps of: producing a left output signal for, transmission to a left loudspeaker of said pair, which is equivalent to the sum of the mid input signal (M) attenuated by a factor α and the side input signal (S), producing a right output signal for transmission to a right loudspeaker of said pair, which is equivalent to the sum of the mid input signal (M) attenuated by the factor α and the side signal (S) phase shifted 180°.