An audio processor for processing an audio signal to obtain a subband representation of the audio signal, the audio processor comprising: a cascaded lapped critically sampled transform stage configured to perform a cascaded lapped critically sampled transform on at least two partially overlapping blocks (108_1;108_2) of samples of the audio signal, to obtain sets (110_1,1;110_1,2) of subband samples on the basis of a first block (108_1) of samples of the audio signal, and to obtain sets (110_2,1;110_2,2) of subband samples on the basis of a second block (108_2) of samples of the audio signal; a first time-frequency transform stage configured to identify, in case that the sets (110_1,1;110_1,2) of subband samples that are based on the first block (108_1) of samples represent different regions in a time-frequency plane compared to the sets (110_2,1;110_2,2) of subband samples that are based on the second block (108_2) of samples, one or more sets of subband samples out of the sets (110_1,1;110_1,2) of subband samples that are based on the first block (108_1) of samples and one or more sets of subband samples out of the sets (110_2,1;110_2,2) of subband samples that are based on the second block (108_2) of samples that in combination represent the same region in the time-frequency plane, and to time-frequency transform the identified one or more sets of subband samples out of the sets (110_2,1;110_2,2) of subband samples that are based on the first block (108_1) of samples and/or the identified one or more sets of subband samples out of the sets (110_2,1;110_2,2) of subband samples that are based on the second block (108_2) of samples, to obtain one or more time-frequency transformed subband samples, each of which represents the same region in the time-frequency plane than a corresponding one of the identified one or more subband samples or one or more time-frequency transformed versions thereof; and a time domain aliasing reduction stage configured to perform a weighted combination of two corresponding sets of subband samples or time-frequency transformed versions thereof, one obtained on the basis of the first block (108_1) of samples of the audio signal and one obtained on the basis on the second block (108_2) of samples of the audio signal, to obtain aliasing reduced subband representations (112_1-112_2) of the audio signal. a cascaded lapped critically sampled transform stage configured to perform a cascaded lapped critically sampled transform on at least two partially overlapping blocks (108_1;108_2) of samples of the audio signal, to obtain sets (110_1,1;110_1,2) of subband samples on the basis of a first block (108_1) of samples of the audio signal, and to obtain sets (110_2,1;110_2,2) of subband samples on the basis of a second block (108_2) of samples of the audio signal; a first time-frequency transform stage configured to identify, in case that the sets (110_1,1;110_1,2) of subband samples that are based on the first block (108_1) of samples represent different regions in a time-frequency plane compared to the sets (110_2,1;110_2,2) of subband samples that are based on the second block (108_2) of samples, one or more sets of subband samples out of the sets (110_1,1;110_1,2) of subband samples that are based on the first block (108_1) of samples and one or more sets of subband samples out of the sets (110_2,1;110_2,2) of subband samples that are based on the second block (108_2) of samples that in combination represent the same region in the time-frequency plane, and to time-frequency transform the identified one or more sets of subband samples out of the sets (110_2,1;110_2,2) of subband samples that are based on the first block (108_1) of samples and/or the identified one or more sets of subband samples out of the sets (110_2,1;110_2,2) of subband samples that are based on the second block (108_2) of samples, to obtain one or more time-frequency transformed subband samples, each of which represents the same region in the time-frequency plane than a corresponding one of the identified one or more subband samples or one or more time-frequency transformed versions thereof; and a time domain aliasing reduction stage configured to perform a weighted combination of two corresponding sets of subband samples or time-frequency transformed versions thereof, one obtained on the basis of the first block (108_1) of samples of the audio signal and one obtained on the basis on the second block (108_2) of samples of the audio signal, to obtain aliasing reduced subband representations (112_1-112_2) of the audio signal.