move to new cspot

components/spotify/cspot/bell/example/scripts/dsp_spectogram.py

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+import matplotlib.pyplot as plt
+from scipy import signal
+from scipy.io import wavfile
+
+sample_rate, samples = wavfile.read('out.wav')
+print(sample_rate)
+frequencies, times, spectrogram = signal.spectrogram(samples, sample_rate)
+
+plt.pcolormesh(times, frequencies, spectrogram)
+plt.imshow(spectrogram)
+plt.ylabel('Frequency [Hz]')
+plt.xlabel('Time [sec]')
+plt.show()