small bug fix

        cls,

        name: str,

        filename: Path,

        metadata_file: str,

        metadata_file: Union[str, list],

        fs: Optional[int] = None,

    ) -> "MetadataAssistedSpatialAudio":

        obj = super()._from_file(name, filename, fs)

        if isinstance(metadata_file, list):

            if len(metadata_file) > 1:

                warn("Only first metadata file used. Additional metadata ignored for MASA")

            obj.metadata_file = Path(metadata_file[0])

        else:

            obj.metadata_file = Path(metadata_file)

        return obj