3 from aubio import miditofreq
4 from numpy import arange
7 midi = arange(-10, 148 * upsampling)
9 freq = miditofreq(midi)
11 from matplotlib import pyplot as plt
14 ax.semilogy(midi, freq, '.')
15 ax.set_xlabel('midi note')
16 ax.set_ylabel('frequency (Hz)')