Acoustic reproduction system

A sound reproduction system for reproducing sound in a listening space in which a listener is present, comprising:

• a plurality of speakers disposed in the listening space;
• and
• a controller configured to cause the plurality of speakers to reproduce two channels of sound including a left channel and a right channel, based on a left recording signal corresponding to a left ear of the listener and a right recording signal corresponding to a right ear of the listener;
• wherein the plurality of speakers comprises a plurality of left speakers corresponding to the left channel and a plurality of right speakers corresponding to the right channel, and a discretized frequency bandwidth is preset for each of the plurality of left speakers and for each of the plurality of right speakers such that their respective output frequency bandwidths differ;
• the controller configured to apply an approximate inverse matrix, which approximates an inverse of a plant matrix representing transfer paths from the plurality of speakers to both ears of the listener, to the left recording signal and the right recording signal, thereby causing the plurality of speakers to reproduce sound;
• the sound output from the plurality of speakers comprises direct components being sound output from the plurality of left speakers to the listener's left ear and from the plurality of right speakers to the listener's right ear and cross components being sound output from the plurality of left speakers to the listener's right ear and from the plurality of right speakers to the listener's left ear;
• the approximate inverse matrix is expressed as a product of a gain correction term that corrects the signal intensity of the direct components in a frequency-dependent manner, a coefficient correction term that corrects, in a frequency-dependent manner, the intensity difference between the direct components and the cross components, a phase inversion term that inverts the phase of the cross components, and a delay correction term that applies a frequency-dependent time delay to the cross components;
• and
• the controller comprises a plurality of circuits implementing the gain correction term, the coefficient correction term, the phase inversion term, and the delay correction term.