Scipy stft, how is shape of f determined?

Asked Mar 07 '19 at 16:02

Active Mar 07 '19 at 16:02

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Using scipy stft, like this :

sample_rate, samples = scipy.io.wavfile.read(sample_dir/'original'/test_sample_name)
f, t, Zxx = scipy.signal.stft(samples.transpose(), sample_rate)

f.shape is equal to 129. My understanding is that this number represents the number of frequency at which we evaluate the Fourier Transform. How is it calculated? Can we fix this number?

asked Mar 07 '19 at 16:02

Statistic Dean

can you read the scipy.signal.stft documentation, where how to set is explained, and reformulate that question based on that knowlede? – Marcus Müller Mar 07 '19 at 18:36
A year late, but I found the size of f to be either equal to the hop size H = nperseg - noverlap or half the value of nfft. No idea why. – Mossmyr Mar 03 '20 at 13:42

Scipy stft, how is shape of f determined?

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