Method for calibrating an assembly for sound playback of a multi-channel sound signal having a plurality of loudspeakers, the method having the following steps: - obtaining multi-directional impulse responses from the loudspeakers of the playback assembly upon reproduction of a reference audio signal; - analyzing the multi-directional impulse responses obtained, in a domain of spatio-temporal representation, over at least one time window encompassing the instants of arrival of the early reflections of the reproduced reference audio signal in order to determine a set of characteristics of the direct waves and of the associated early reflections comprising at least the amplitude; the method being characterized in that is has the following steps: - comparing the amplitude of each of the reflections with a determined perceptibility threshold as a function of characteristics of the direct wave and of the early reflections of the reference audio signal and identifying the non-perceptible reflections for which the amplitude is below the determined threshold; - modifying the impulse responses obtained in order to obtain perceptual impulse responses, by suppression of the reflections identified as non-perceptible; - determining a filtering matrix with the steps of: - determination of an error signal defined by the difference between a target response signal for a playback assembly and a response signal reconstructed from the perceptual impulse responses; - multi-channel inversion by minimization of the error signal thus determined in order to obtain the filters of the filtering matrix, for an application of this filtering matrix to the multi-channel audio signal before sound playback. - obtaining multi-directional impulse responses from the loudspeakers of the playback assembly upon reproduction of a reference audio signal; - analyzing the multi-directional impulse responses obtained, in a domain of spatio-temporal representation, over at least one time window encompassing the instants of arrival of the early reflections of the reproduced reference audio signal in order to determine a set of characteristics of the direct waves and of the associated early reflections comprising at least the amplitude; - comparing the amplitude of each of the reflections with a determined perceptibility threshold as a function of characteristics of the direct wave and of the early reflections of the reference audio signal and identifying the non-perceptible reflections for which the amplitude is below the determined threshold; - modifying the impulse responses obtained in order to obtain perceptual impulse responses, by suppression of the reflections identified as non-perceptible; - determining a filtering matrix with the steps of: - determination of an error signal defined by the difference between a target response signal for a playback assembly and a response signal reconstructed from the perceptual impulse responses; - multi-channel inversion by minimization of the error signal thus determined in order to obtain the filters of the filtering matrix, for an application of this filtering matrix to the multi-channel audio signal before sound playback. - determination of an error signal defined by the difference between a target response signal for a playback assembly and a response signal reconstructed from the perceptual impulse responses; - multi-channel inversion by minimization of the error signal thus determined in order to obtain the filters of the filtering matrix,