A method for generating an output signal which is psychoacoustically decorrelated from an input audio signal, the method comprising: filtering the input audio signal using a first filter to generate a first subband signal in a first frequency subband; wherein the first filter comprises a banded phase-flip filter and has a low-pass characteristic; wherein the first subband signal represents the input audio signal with a frequency-dependent change in phase with respect to the input audio signal in the first band; wherein the banded phase-flip filter has a bimodal distribution in frequency of its phase response that flips between substantially positive and negative ninety-degrees at the edges of two or more frequency bands within the passband of the phase-flip filter, and filtering the input audio signal using a second filter to generate a second subband signal in a second frequency subband; wherein the second filter comprises a frequency-dependent delay and has a high-pass characteristic; wherein the second subband signal represents the input audio signal with a frequency-dependent delay with respect to the input audio signal in the second frequency band, wherein: the second frequency subband includes frequencies that are higher than frequencies included in the first frequency subband, and the first frequency subband includes frequencies that are lower than frequencies included in the second frequency subband; and generating the output signal that represents a combination of the first subband signal and the second subband signal. filtering the input audio signal using a first filter to generate a first subband signal in a first frequency subband; wherein the first filter comprises a banded phase-flip filter and has a low-pass characteristic; wherein the first subband signal represents the input audio signal with a frequency-dependent change in phase with respect to the input audio signal in the first band; wherein the banded phase-flip filter has a bimodal distribution in frequency of its phase response that flips between substantially positive and negative ninety-degrees at the edges of two or more frequency bands within the passband of the phase-flip filter, and filtering the input audio signal using a second filter to generate a second subband signal in a second frequency subband; wherein the second filter comprises a frequency-dependent delay and has a high-pass characteristic; wherein the second subband signal represents the input audio signal with a frequency-dependent delay with respect to the input audio signal in the second frequency band, wherein: the second frequency subband includes frequencies that are higher than frequencies included in the first frequency subband, and the first frequency subband includes frequencies that are lower than frequencies included in the second frequency subband; and the second frequency subband includes frequencies that are higher than frequencies included in the first frequency subband, and the first frequency subband includes frequencies that are lower than frequencies included in the second frequency subband; and generating the output signal that represents a combination of the first subband signal and the second subband signal.