diff -r 7de6abf4258d -r 05898b7a0a73 src/pyams_media/interfaces/__init__.py
--- a/src/pyams_media/interfaces/__init__.py	Thu Sep 21 12:42:23 2017 +0200
+++ b/src/pyams_media/interfaces/__init__.py	Fri Oct 13 09:08:48 2017 +0200
@@ -62,14 +62,20 @@
     """Media video converter"""
 
 
+class IVideoType(Interface):
+    """Video content-type interface"""
+
+    video_type = Attribute("Video content type")
+
+
 class IMediaAudioConverter(IMediaConverter):
     """Media audio converter"""
 
 
-class IVideoType(Interface):
-    """Video content-type interface"""
+class IAudioType(Interface):
+    """Audio content-type interface"""
 
-    video_type = Attribute("Video content type")
+    audio_type = Attribute("Audio content type")
 
 
 #