Index: /trunk/src/VBox/Main/src-client/AudioDriver.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/AudioDriver.cpp	(revision 70546)
+++ /trunk/src/VBox/Main/src-client/AudioDriver.cpp	(revision 70547)
@@ -73,4 +73,5 @@
 /**
  * Configures the audio driver (to CFGM) and attaches it to the audio chain.
+ * Does nothing if the audio driver already is attached.
  *
  * @returns IPRT status code.
@@ -113,4 +114,5 @@
 /**
  * Detaches an already attached audio driver from the audio chain.
+ * Does nothing if the audio driver already is detached or not attached.
  *
  * @returns IPRT status code.