Index: /trunk/src/VBox/Devices/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Devices/Makefile.kmk	(revision 65150)
+++ /trunk/src/VBox/Devices/Makefile.kmk	(revision 65151)
@@ -580,7 +580,7 @@
  # audio processing out of EMT as much as possible.
  #
- # Disabled for now.
+ # Disabled for AC'97 for now.
  #VBoxDD_DEFS  += VBOX_WITH_AUDIO_AC97_ASYNC_IO
- #VBoxDD_DEFS  += VBOX_WITH_AUDIO_HDA_ASYNC_IO
+ VBoxDD_DEFS  += VBOX_WITH_AUDIO_HDA_ASYNC_IO
 
  # Not yet enabled: Callbacks for the device emulation to let the backends