Apparatus for generating a frequency enhancement signal, comprising: a calculator for calculating a value describing an energy distribution with respect to frequency in a core signal, the core signal being an audio signal, the value describing the energy distribution with respect to frequency in the core signal being a first value describing a first energy distribution with respect to frequency in the core signal or a second value describing a second energy distribution with respect to frequency in the core signal; a signal generator for generating the frequency enhancement signal comprising an enhancement frequency range not included in the core signal, from the core signal, and wherein the signal generator is configured for shaping the frequency enhancement signal or the core signal so that a spectral envelope of the frequency enhancement signal or of the core signal depends on the value describing the energy distribution with respect to frequency in the core signal, wherein the signal generator is configured to shape the frequency enhancement signal or the core signal so that a first spectral envelope decrease from a first frequency in the enhancement frequency range to a second frequency in the enhancement frequency range is obtained for the first value, and so that a second spectral envelope decrease from the first frequency in the enhancement frequency range to the second frequency in the enhancement frequency range is obtained for the second value, wherein the second frequency is greater than the first frequency, wherein the second spectral envelope decrease is greater than the first spectral envelope decrease, and wherein the first value indicates that the core signal has an energy concentration at a higher frequency of the core signal compared to the second value. a calculator for calculating a value describing an energy distribution with respect to frequency in a core signal, the core signal being an audio signal, the value describing the energy distribution with respect to frequency in the core signal being a first value describing a first energy distribution with respect to frequency in the core signal or a second value describing a second energy distribution with respect to frequency in the core signal; a signal generator for generating the frequency enhancement signal comprising an enhancement frequency range not included in the core signal, from the core signal, and wherein the signal generator is configured for shaping the frequency enhancement signal or the core signal so that a spectral envelope of the frequency enhancement signal or of the core signal depends on the value describing the energy distribution with respect to frequency in the core signal, wherein the signal generator is configured to shape the frequency enhancement signal or the core signal so that a first spectral envelope decrease from a first frequency in the enhancement frequency range to a second frequency in the enhancement frequency range is obtained for the first value, and so that a second spectral envelope decrease from the first frequency in the enhancement frequency range to the second frequency in the enhancement frequency range is obtained for the second value, wherein the second frequency is greater than the first frequency, wherein the second spectral envelope decrease is greater than the first spectral envelope decrease, and wherein the first value indicates that the core signal has an energy concentration at a higher frequency of the core signal compared to the second value.