pitch_features.py 文件源码

def three_melody_matrices(track_id, win=4.0):

    t, melstm, melmat = two_melody_matrices(track_id)
    dt = t[1] - t[0]
    nkern = np.round(win / dt)
    kern1 = np.ones((nkern, 1))
    kern2 = np.zeros((nkern + 1, 1))
    kern = np.vstack((kern1, kern2))
    kern *= 1.0 / nkern
    melfwd = dsp.convolve2d(melmat, kern, mode='same')
    return t, melstm, melmat, melfwd