sample.py 文件源码

def get_32bit_frames(self, scale_amplitude=True):
        """Returns the raw sample frames scaled to 32 bits. See make_32bit method for more info."""
        if self.samplewidth == 4:
            return self.__frames
        frames = audioop.lin2lin(self.__frames, self.samplewidth, 4)
        if not scale_amplitude:
            # we need to scale back the sample amplitude to fit back into 24/16/8 bit range
            factor = 1.0/2**(8*abs(self.samplewidth-4))
            frames = audioop.mul(frames, 4, factor)
        return frames