n, ticker, labeler = __get_shape_artists(data, horiz)
positions = np.arange(0, n, max(1, float(n) / bins_per_octave))
// Labels start at 9 here because chroma starts at A.
values = core.midi_to_note(np.arange(9, 9+12), octave=False)
ticker(positions, values)
After Change
//positions = np.linspace(0, n-1, num=n_ticks, endpoint=True).astype(int)
// Generate the template positions
pos = np.asarray([0, 2, 3, 5, 7, 8, 10]) * bins_per_octave // 12
n_octaves = np.ceil(n / float(bins_per_octave))
positions = pos.copy()
for i in range(1, int(n_octaves)):
positions = np.append(positions, pos + i * bins_per_octave, axis=0)
// Labels start at 9 here because chroma starts at A.
values = core.midi_to_note(positions * 12 // bins_per_octave + 9, octave=False)
// values = core.midi_to_note(np.arange(9, 9+n), octave=False)
