Index: /trunk/include/VBox/vmm/pdmaudioifs.h
===================================================================
--- /trunk/include/VBox/vmm/pdmaudioifs.h	(revision 68401)
+++ /trunk/include/VBox/vmm/pdmaudioifs.h	(revision 68402)
@@ -310,4 +310,9 @@
  *
  * Currently only two (2) channels, left and right, are supported.
+ *
+ * Note: When changing this structure, make sure to also handle
+ *       VRDP's input / output processing in DrvAudioVRDE, as VRDP
+ *       expects audio data in st_sample_t format (historical reasons)
+ *       which happens to be the same as PDMAUDIOFRAME for now.
  */
 typedef struct PDMAUDIOFRAME