what is the FFT size used in spectrogram/mfcc?

[jenweilee]

[jenweilee]

For calculating the spectrogram/mfcc, I saw the preprocessing of audio uses the function contrib_audio.audio_spectrogram and contrib_audio.mfcc by tensorflow. But where is the parameter of FFT size or what is the default value of it.

[saichand07]

FFT used in this example is 1024 size, normally sizes of fft is always 2th power (128,256,512.....)