I am from an ML background and I am working on MP3 audio reconstruction and I have managed some amount of spectrogram reconstruction but I have noticed that the higher frequency end of the generated Power Spectral Density plot(Wave2) isn't matching with the original audio's plot (Wave1).
There is a similar distribution in the magnitude spectrum which is obvious since the two are linked. I wanted to know if there is any way I could regenerate the higher frequency power (or magnitude) because I cannot map the input PSD data to output PSD data as there is no way to convert the PSD data back to an audio clip even if I am successful in mapping them. The real and imaginary part re-constructions for the spectrogram reconstruction are visually pretty accurate but I am still unsure about how to approach this issue. Any guidance would be great!