'Applying CNN to Fast time Fourier Transform?

I have data that fast time fourier transform is applied. (amplitudes at specific Hzs)

There are solutions on internet that CNN is applied to mel spectrogram, however, I see no solution that CNN is applied to Fast Fourier Transformed signal.

Is it possible that CNN is applied to Fast Fourier Transformed signals?

Or is it not possible because CNN is considering temporal attribute?

Thanks! enter image description here

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'Applying CNN to Fast time Fourier Transform?

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