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Mel-frequency cepstrum
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== Inversion == An MFCC can be approximately inverted to audio in four steps: (a1) inverse DCT to obtain a mel log-power [dB] spectrogram, (a2) mapping to power to obtain a mel power spectrogram, (b1) rescaling to obtain [[short-time Fourier transform]] magnitudes, and finally (b2) phase reconstruction and audio synthesis using Griffin-Lim. Each step corresponds to one step in MFCC calculation.<ref>{{cite web |title=librosa.feature.inverse.mfcc_to_audio β librosa 0.10.0 documentation |url=https://librosa.org/doc/latest/generated/librosa.feature.inverse.mfcc_to_audio.html |website=librosa.org}}</ref>
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