diff --git a/iiify/resolver.py b/iiify/resolver.py
index 54e233b..5335a6d 100644
--- a/iiify/resolver.py
+++ b/iiify/resolver.py
@@ -50,7 +50,10 @@ def to_mimetype(format):
         "h.264 MPEG4": "video/mpeg",
         "h.264": "video/mpeg",
         "Matroska": "video/x-matroska",
-        "Cinepack": "video/x-msvideo"
+        "Cinepack": "video/x-msvideo",
+        "AIFF": "audio/aiff",
+        "Apple Lossless Audio": "audio/x-m4a",
+        "MPEG-4 Audio": "audio/mp4" 
     }
     return formats.get(format, "application/octet-stream")
 
@@ -388,7 +391,7 @@ def create_manifest3(identifier, domain=None, page=None):
                 originals.append(f)
 
         # create the canvases for each original
-        for file in [f for f in originals if f['format'] in ['VBR MP3', '32Kbps MP3', '56Kbps MP3', '64Kbps MP3', '96Kbps MP3', '128Kbps MP3', 'Flac', 'Ogg Vorbis', 'WAVE', '24bit Flac', 'Shorten']]:
+        for file in [f for f in originals if f['format'] in ['VBR MP3', '32Kbps MP3', '56Kbps MP3', '64Kbps MP3', '96Kbps MP3', '128Kbps MP3', 'MPEG-4 Audio', 'Flac', 'AIFF', 'Apple Lossless Audio', 'Ogg Vorbis', 'WAVE', '24bit Flac', 'Shorten']]:
             normalised_id = file['name'].rsplit(".", 1)[0]
             slugged_id = normalised_id.replace(" ", "-")
             c_id = f"https://iiif.archivelab.org/iiif/{identifier}/{slugged_id}/canvas"
@@ -402,7 +405,7 @@ def create_manifest3(identifier, domain=None, page=None):
             if file['name'] in derivatives:
                 body = Choice(items=[])
                 # add the choices in order per https://github.com/ArchiveLabs/iiif.archivelab.org/issues/77#issuecomment-1499672734
-                for format in ['VBR MP3', '32Kbps MP3', '56Kbps MP3', '64Kbps MP3', '96Kbps MP3', '128Kbps MP3', 'Flac', 'Ogg Vorbis', 'WAVE', '24bit Flac', 'Shorten']:
+                for format in ['VBR MP3', '32Kbps MP3', '56Kbps MP3', '64Kbps MP3', '96Kbps MP3', '128Kbps MP3', 'MPEG-4 Audio', 'Flac', 'AIFF', 'Apple Lossless Audio', 'Ogg Vorbis', 'WAVE', '24bit Flac', 'Shorten']:
                     if format in derivatives[file['name']]:
                         r = ResourceItem(id=f"https://archive.org/download/{identifier}/{derivatives[file['name']][format]['name'].replace(' ', '%20')}",
                                          type='Audio',