Index: /trunk/src/VBox/Devices/Audio/HDAStream.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/HDAStream.cpp	(revision 76044)
+++ /trunk/src/VBox/Devices/Audio/HDAStream.cpp	(revision 76045)
@@ -251,4 +251,5 @@
                  "falling back to stereo channels for stream #%RU8\n", Props.cChannels, uSD));
         Props.cChannels = 2;
+        Props.cShift    = PDMAUDIOPCMPROPS_MAKE_SHIFT_PARMS(Props.cBytes, Props.cChannels);
     }
 #endif