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Tessero\Signal\ZoomFft

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__construct 
__construct(int $n, mixed $fn, mixed $m = null, mixed $fs = 2, bool $endpoint = false)

for which the range [0, fn] is assumed.

transform 
transform(mixed $x): mixed

Apply the zoom FFT to $x (equivalent to scipy.signal.zoom_fft(x, fn, m, fs, endpoint)).