formating

        # consider SBA format for condition

        condition_fmt = audio.fromtype(self.sba_format)

        if isinstance(self.in_fmt, audio.SceneBasedAudio):

            if not isinstance(condition_fmt, audio.SceneBasedAudio) or (condition_fmt.num_channels > self.in_fmt.num_channels):

            if not isinstance(condition_fmt, audio.SceneBasedAudio) or (

                condition_fmt.num_channels > self.in_fmt.num_channels

            ):

                raise ValueError("SBA format has to be SBA with lower order than input signal")

            is_planar = condition_fmt.is_planar

        else: