How to use the pydub.utils.audioop.add function in pydub

while times:
            remaining = max(0, seg1_len - pos)
            if seg2_len >= remaining:
                seg2 = seg2[:remaining]
                seg2_len = remaining
                # we've hit the end, we're done looping (if we were) and this
                # is our last go-around
                times = 1

            if gain_during_overlay:
                seg1_overlaid = seg1[pos:pos + seg2_len]
                seg1_adjusted_gain = audioop.mul(seg1_overlaid, self.sample_width,
                                               db_to_float(float(gain_during_overlay)))
                output.write(audioop.add(seg1_adjusted_gain, seg2, sample_width))
            else:
                output.write(audioop.add(seg1[pos:pos + seg2_len], seg2,
                                     sample_width))
            pos += seg2_len

            # dec times to break our while loop (eventually)
            times -= 1

        output.write(seg1[pos:])

        return spawn(data=output)

seg1_len = len(seg1)
        seg2_len = len(seg2)
        while times:
            remaining = max(0, seg1_len - pos)
            if seg2_len >= remaining:
                seg2 = seg2[:remaining]
                seg2_len = remaining
                # we've hit the end, we're done looping (if we were) and this
                # is our last go-around
                times = 1

            if gain_during_overlay:
                seg1_overlaid = seg1[pos:pos + seg2_len]
                seg1_adjusted_gain = audioop.mul(seg1_overlaid, self.sample_width,
                                                 db_to_float(float(gain_during_overlay)))
                output.write(audioop.add(seg1_adjusted_gain, seg2, sample_width))
            else:
                output.write(audioop.add(seg1[pos:pos + seg2_len], seg2,
                                         sample_width))
            pos += seg2_len

            # dec times to break our while loop (eventually)
            times -= 1

        output.write(seg1[pos:])

        return spawn(data=output)

"""
    if seg.channels == 1:
        left = right = seg
    elif seg.channels == 2:
        left, right = seg.split_to_mono()
    
    l_mult_factor = db_to_float(left_gain)
    r_mult_factor = db_to_float(right_gain)
    
    left_data = audioop.mul(left._data, left.sample_width, l_mult_factor)
    left_data = audioop.tostereo(left_data, left.sample_width, 1, 0)
    
    right_data = audioop.mul(right._data, right.sample_width, r_mult_factor)
    right_data = audioop.tostereo(right_data, right.sample_width, 0, 1)
    
    output = audioop.add(left_data, right_data, seg.sample_width)
    
    return seg._spawn(data=output,
                overrides={'channels': 2,
                           'frame_width': 2 * seg.sample_width})

seg1_len = len(seg1)
        seg2_len = len(seg2)
        while times:
            remaining = max(0, seg1_len - pos)
            if seg2_len >= remaining:
                seg2 = seg2[:remaining]
                seg2_len = remaining
                # we've hit the end, we're done looping (if we were) and this
                # is our last go-around
                times = 1

            if gain_during_overlay:
                seg1_overlaid = seg1[pos:pos + seg2_len]
                seg1_adjusted_gain = audioop.mul(seg1_overlaid, self.sample_width,
                                               db_to_float(float(gain_during_overlay)))
                output.write(audioop.add(seg1_adjusted_gain, seg2, sample_width))
            else:
                output.write(audioop.add(seg1[pos:pos + seg2_len], seg2,
                                     sample_width))
            pos += seg2_len

            # dec times to break our while loop (eventually)
            times -= 1

        output.write(seg1[pos:])

        return spawn(data=output)

if self.channels == 1:
            return self._spawn(data=remove_data_dc(self._data, offset))

        left_channel = audioop.tomono(self._data, self.sample_width, 1, 0)
        right_channel = audioop.tomono(self._data, self.sample_width, 0, 1)

        if not channel or channel == 1:
            left_channel = remove_data_dc(left_channel, offset)

        if not channel or channel == 2:
            right_channel = remove_data_dc(right_channel, offset)

        left_channel = audioop.tostereo(left_channel, self.sample_width, 1, 0)
        right_channel = audioop.tostereo(right_channel, self.sample_width, 0, 1)

        return self._spawn(data=audioop.add(left_channel, right_channel,
                                            self.sample_width))

if self.channels == 1:
            return self._spawn(data=remove_data_dc(self._data, offset))

        left_channel = audioop.tomono(self._data, self.sample_width, 1, 0)
        right_channel = audioop.tomono(self._data, self.sample_width, 0, 1)

        if not channel or channel == 1:
            left_channel = remove_data_dc(left_channel, offset)

        if not channel or channel == 2:
            right_channel = remove_data_dc(right_channel, offset)

        left_channel = audioop.tostereo(left_channel, self.sample_width, 1, 0)
        right_channel = audioop.tostereo(right_channel, self.sample_width, 0, 1)

        return self._spawn(data=audioop.add(left_channel, right_channel,
                                            self.sample_width))