what is the FFT size used in spectrogram/mfcc?

ARM-software / ML-KWS-for-MCU

Keyword spotting on Arm Cortex-M Microcontrollers

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what is the FFT size used in spectrogram/mfcc? #82

Open jenweilee opened 5 years ago

jenweilee commented 5 years ago

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 commented 5 years ago

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