24 lines
366 B
Python
24 lines
366 B
Python
#!/usr/bin/env python3
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import scipy.io.wavfile
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from matplotlib import pyplot as plt
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import numpy as np
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def main():
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rate, data = scipy.io.wavfile.read("demod.wav")
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data = data - np.average(data)
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data = data / np.max(np.abs(data))
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deriv = np.abs(data[1:] - data[0:-1])
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plt.plot(deriv)
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plt.show()
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if __name__ == '__main__':
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main()
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