Index: /trunk/src/VBox/Devices/Audio/DevSB16.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DevSB16.cpp	(revision 55907)
+++ /trunk/src/VBox/Devices/Audio/DevSB16.cpp	(revision 55908)
@@ -1971,4 +1971,5 @@
 
 #ifdef VBOX_WITH_PDM_AUDIO_DRIVER
+#if 0
     PSB16DRIVER pDrv;
     RTListForEach(&pThis->lstDrv, pDrv, SB16DRIVER, Node)
@@ -1980,4 +1981,5 @@
         }
     }
+#endif
 #else
     AUD_close_out (&pThis->card, pThis->voice);
@@ -2020,4 +2022,8 @@
         sb16SpeakerControl(pThis, pThis->speaker);
     }
+
+    /* Update the master (mixer) and PCM out volumes. */
+    sb16SetMasterVolume(pThis);
+    sb16SetPcmOutVolume(pThis);
 
     return VINF_SUCCESS;