Convert some old-style string exceptions to class exceptions.
diff --git a/Lib/audiodev.py b/Lib/audiodev.py
index e7cff6c..9d4ddc2 100644
--- a/Lib/audiodev.py
+++ b/Lib/audiodev.py
@@ -1,6 +1,7 @@
 """Classes for manipulating audio devices (currently only for Sun and SGI)"""
 
-error = 'audiodev.error'
+class error(Exception):
+	pass
 
 class Play_Audio_sgi:
 	# Private instance variables