An apparatus for generating an audio output signal based on an encoded audio signal spectrum, wherein the apparatus comprises: a processing unit for processing the encoded audio signal spectrum to obtain a decoded audio signal spectrum comprising a plurality of spectral coefficients, wherein each of the spectral coefficients has a spectral location within the encoded audio signal spectrum and a spectral value, wherein the spectral coefficients are sequentially ordered according to their spectral location within the encoded audio signal spectrum so that the spectral coefficients form a sequence of spectral coefficients, a pseudo coefficients determiner for determining one or more determined coefficients of the decoded audio signal spectrum, wherein each determined coefficient of the one or more determined coefficients is one of the plurality of spectral coefficients having a spectral value, wherein the pseudo coefficients determiner is configured to determine the one or more determined coefficients by determining at least one spectral coefficient of the plurality of spectral coefficients, which has a spectral value which is different from a predefined value, which has an immediate predecessor the spectral value of which is equal to the predefined value, and which has an immediate successor the spectral value of which is equal to the predefined value, a replacement unit for replacing at least one of the one or more determined coefficients and at least one of a predecessor and a successor of each of the at least one or more determined coefficients, by a determined spectral pattern to obtain a modified audio signal spectrum, wherein the determined spectral pattern comprises at least two pattern coefficients, wherein each of the at least two pattern coefficients has a spectral value, and a spectrum-time-conversion unit for converting the modified audio signal spectrum to a time-domain to obtain the audio output signal. a processing unit for processing the encoded audio signal spectrum to obtain a decoded audio signal spectrum comprising a plurality of spectral coefficients, wherein each of the spectral coefficients has a spectral location within the encoded audio signal spectrum and a spectral value, wherein the spectral coefficients are sequentially ordered according to their spectral location within the encoded audio signal spectrum so that the spectral coefficients form a sequence of spectral coefficients, a pseudo coefficients determiner for determining one or more determined coefficients of the decoded audio signal spectrum, wherein each determined coefficient of the one or more determined coefficients is one of the plurality of spectral coefficients having a spectral value, wherein the pseudo coefficients determiner is configured to determine the one or more determined coefficients by determining at least one spectral coefficient of the plurality of spectral coefficients, which has a spectral value which is different from a predefined value, which has an immediate predecessor the spectral value of which is equal to the predefined value, and which has an immediate successor the spectral value of which is equal to the predefined value, a replacement unit for replacing at least one of the one or more determined coefficients and at least one of a predecessor and a successor of each of the at least one or more determined coefficients, by a determined spectral pattern to obtain a modified audio signal spectrum, wherein the determined spectral pattern comprises at least two pattern coefficients, wherein each of the at least two pattern coefficients has a spectral value, and a spectrum-time-conversion unit for converting the modified audio signal spectrum to a time-domain to obtain the audio output signal.