Audio decoder and audio encoder for coding frames using a pitch frequency dependent spectral shaping

Embodiments according to the invention comprise an audio decoder configured to, for a predetermined frame among consecutive frames, decode, from a data stream, a quantized spectrum, a linear prediction coefficient based spectral envelope representation and a fundamental frequency related parameter. The decoder is configured to determine a spectral shaping function from the linear prediction coefficient based spectral envelope representation using a first manner below a pitch frequency determined from the fundamental frequency related parameter, and a second manner above the pitch frequency, to spectrally shape the quantized spectrum using the spectral shaping function to obtain a dequantized spectrum and to reconstruct the predetermined frame using the dequantized spectrum. Furthermore, the audio decoder is configured so that the spectral shaping function is, at a predetermined spectral position, lower if the pitch frequency is spectrally higher than the predetermined spectral position, than compared to if the pitch frequency is spectrally lower than the predetermined spectral position.Further decoders, encoders and methods are disclosed.