--- a/inc/ucommon/audio.h
+++ b/inc/ucommon/audio.h
@@ -23,6 +23,11 @@
  * accessing of audio files, tone generation and detection, and phrasebook
  * voice libraries.
  * @file ucommon/audio.h
+ */
+
+/**
+ * Some testing code for audio classes.
+ * @example audio.cpp
  */
 
 #ifndef _UCOMMON_AUDIO_H_