generic.py 文件源码

def rms(audio_fragment, sample_width_in_bytes=2):
    """Given audio fragment, return the root mean square."""
    # Equal to
    # return int(np.sqrt(np.mean(np.square(
    #     np.absolute(audio_fragment.astype(np.float))))))
    return audioop.rms(np.abs(audio_fragment), sample_width_in_bytes)