audio_tools.py 文件源码

def harvest_filter_f0_contour(f0, st, ed, b, a):
    smoothed_f0 = f0.copy()
    smoothed_f0[:st] = smoothed_f0[st]
    smoothed_f0[ed + 1:] = smoothed_f0[ed]
    aaa = sg.lfilter(b, a, smoothed_f0)
    bbb = sg.lfilter(b, a, aaa[::-1])
    smoothed_f0 = bbb[::-1].copy()
    smoothed_f0[:st] = 0.
    smoothed_f0[ed + 1:] = 0.
    return smoothed_f0