sample.py 文件源码

def mono(self, left_factor=1.0, right_factor=1.0):
        """Make the sample mono (1-channel) applying the given left/right channel factors when downmixing"""
        assert not self.__locked
        if self.__nchannels == 1:
            return self
        if self.__nchannels == 2:
            self.__frames = audioop.tomono(self.__frames, self.__samplewidth, left_factor, right_factor)
            self.__nchannels = 1
            return self
        raise ValueError("sample must be stereo or mono already")