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DalyaG/sanity_check_for_mel_spectrogram.py

Created May 9, 2020 20:18
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Sanity Check for Mel Spectrogram Computation
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sanity_check_for_mel_spectrogram.py
# Sanity check that indeed we understood the underlying pipeline
S = librosa.feature.melspectrogram(whale_song, sr=sr, n_fft=n_fft, hop_length=hop_length, n_mels=n_mels)
fft_windows = librosa.stft(whale_song, n_fft=n_fft, hop_length=hop_length)
magnitude = np.abs(fft_windows)**2
mel = librosa.filters.mel(sr=sr, n_fft=n_fft, n_mels=n_mels)
assert (mel.dot(magnitude) == S).all()
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