Abstract: A sound-processing apparatus for processing a sound-bearing signal. The apparatus has a signal decomposition module for separating the sound-bearing signal into a plurality of signal components comprising a plurality of perceptual feature components, a spectrum modification module and a phase adjustment module for modifying the spectrum and time delay of each of the plurality of signal components, a psychoacoustical signal processing module having a plurality of psychoacoustic filters for filtering the plurality of signal components into a group of left (L) signals and a group of right (L) signals which are combined for outputting a L output signal and a R output signal for sound generation.