fix PLANARFOA to MASA and FOA conversions

        render_sba_to_sba(sba, out)

    # SBA -> MASA

    elif isinstance(out, audio.MetadataAssistedSpatialAudio) and sba.name == "FOA":

    # NOTE: only allowed for 1st order ambisonics ("FOA" + "PLANARFOA")

    elif isinstance(out, audio.MetadataAssistedSpatialAudio) and sba.name.endswith("FOA"):

        render_sba_to_masa(sba, out)

    else:

        sba_out.audio = np.pad(

            sba_in.audio, [[0, 0], [0, sba_out.num_channels - sba_in.num_channels]]

        )

    elif sba_out.ambi_order < sba_in.ambi_order:

    elif sba_out.ambi_order <= sba_in.ambi_order:

        sba_out.audio = sba_in.audio[:, : sba_out.num_channels]

    if sba_out.is_planar:

    sba_in: audio.SceneBasedAudio,

    masa_out: audio.MetadataAssistedSpatialAudio,

) -> None:

    assert sba_in.name == "FOA"

    # two dir only possible from HOA2

    # two dir only possible from HOA2, which is not yet implemented as conversion

    num_dirs = 1

    num_tcs = masa_out.audio.shape[1]

    md_out_path = masa_out.metadata_file

    if num_dirs not in [1, 2]:

        raise ValueError(f"Only 1 or 2 directions supported, but {num_dirs} was given.")

    if sba.name not in ["FOA", "HOA2"]:

    if sba.name not in [ "PLANARFOA", "FOA", "HOA2"]:

       raise ValueError(f"Only FOA or HOA2 suported, but {sba.name} was given.")

    cmd = [