spectrum_analyzer.py 文件源码

def __init__(self, size, sample_rate=16000, band_number=12, window=[50, 8000]):
        self.size = 1 << math.frexp(size - 1)[1]
        self.sample_rate = float(sample_rate)
        self.resolution = self.sample_rate / self.size  # (sample_rate/2) / (band/2)

        self.set_band(band_number, window)

        self.fft = FFT(self.size)