diff --git a/wavinfo/wave_ixml_reader.py b/wavinfo/wave_ixml_reader.py
index d4f39c1..a3b19af 100644
--- a/wavinfo/wave_ixml_reader.py
+++ b/wavinfo/wave_ixml_reader.py
@@ -9,7 +9,7 @@ IXMLTrack = namedtuple('IXMLTrack', ['channel_index', 'interleave_index', 'name'
 
 class SteinbergMetadata:
     """
-    Vendor-specific Steinberg metadata
+    Vendor-specific Steinberg metadata.
     """
 
     class AudioSpeakerArrangement(IntEnum):
@@ -49,20 +49,87 @@ class SteinbergMetadata:
         AURO_13_0 = 41
         AURO_13_1 = 42
 
-    def __init__(self, xml : ET.ElementTree) -> None:
+    Steinberg_xpath = "//BWFXML/STEINBERG"
+
+    @classmethod
+    def present(cls, xml: ET.ElementTree) -> bool:
         """
-        Parse Steinberg iXML data
+        Test if `xml` has Steinberg metadata.
+        :param xml: an iXML ElementTree
+        """
+        x = xml.find(cls.Steinberg_xpath)
+        return len(x) > 0
+
+    def __init__(self, xml: ET.ElementTree) -> None:
+        """
+        Parse Steinberg iXML data.
         :param xml: The entire iXML Tree
         """
         self.parsed = xml.find("//BWFXML/STEINBERG")
 
     @property
     def audio_speaker_arrangement(self) -> AudioSpeakerArrangement:
+        """
+        AudioSpeakerArrangement
+        """
         val = self.parsed.find("./ATTR_LIST/ATTR[NAME/text() = 'AudioSpeakerArrangement']/VALUE/text()")
         return type(self).AudioSpeakerArrangement(int(val))
 
-    
+    @property
+    def sample_format_size(self) -> Optional[int]:
+        """
+        AudioSampleFormatSize
+        """
+        pass
 
+    @property
+    def media_company(self) -> Optional[str]:
+        """
+        MediaCompany
+        """
+        pass
+
+    @property
+    def media_drop_frames(self) -> Optional[bool]:
+        """
+        MediaDropFrames
+        """
+        pass
+
+    @property
+    def media_duration(self) -> Optional[float]:
+        """
+        MediaDuration
+        """
+        pass 
+
+    @property
+    def media_start_time(self) -> Optional[float]:
+        """
+        MediaStartTime
+        """
+        pass
+
+    @property
+    def media_track_title(self) -> Optional[str]:
+        """
+        MediaTrackTitle
+        """
+        pass
+
+    @property
+    def program_name(self) -> Optional[str]:
+        """
+        ProgramName
+        """
+        pass
+
+    @property
+    def program_version(self) -> Optional[str]:
+        """
+        ProgramVersion
+        """
+        pass
 
 
 class WavIXMLFormat:
@@ -158,7 +225,10 @@ class WavIXMLFormat:
         """
         Steinberg vendor iXML metadata if present.
         """
-        return SteinbergMetadata(self.raw_xml)
+        if SteinbergMetadata.present(self.raw_xml):
+            return SteinbergMetadata(self.raw_xml)
+        else:
+            return None
 
     def to_dict(self):
         return dict(track_list=list(map(lambda x: x._asdict(), self.track_list)), 
@@ -169,86 +239,3 @@ class WavIXMLFormat:
             family_uid=self.family_uid,
             family_name=self.family_name 
             )
-
-# Nuendo Audio Speaker Arrangement Codes
-
-
-
-
-
-# Nuendo Keys
-# AudioSampleFormatSize, AudioSpeakerArrangement, MediaCompany, MediaDropFrames, MediaDuration(float) (seconds, session length?), 
-# MediaStartTime(float), MediaTrackTitle, ProgramName, ProgramVersion, 
-
-
-
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - LRCS.wav
-# 14
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Stereo.wav
-# 1
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - LRC.wav
-# 10
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Mono.wav
-# 0
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Quad.wav
-# 15
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 5.1.wav
-# 19
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 5.0.wav
-# 18
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 6.1 Surround EX.wav
-# 22
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 6.0 Surround EX.wav
-# 20
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 7.1 SDDS.wav
-# 26
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 7.0 SDDS.wav
-# 24
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 7.0.wav
-# 25
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 7.1.wav
-# 27
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 6.1 Music.wav
-# 23
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 7.1.2.wav
-# 33
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 5.0.4.wav
-# 35
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 5.1.4.wav
-# 36
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 7.0.2.wav
-# 48
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 7.1.4.wav
-# 44
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 7.1.6.wav
-# 51
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 9.1.4.wav
-# 53
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Atmos 9.1.6.wav
-# 55
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 3OA.wav
-# 47
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 1OA.wav
-# 45
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - 2OA.wav
-# 46
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Auro3d 10.0.wav
-# 37
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Auro3d 10.1.wav
-# 38
-
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Auro3d 13.1.wav
-# 42
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Auro3d 13.0.wav
-# 41
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Auro3d 11.0.wav
-# 39
-#  tests/test_files/nuendo//wavinfo Test Project - Audio - Auro3d 11.1.wav
-# 40