diff --git a/Aircraft/c172p/c172p-set.xml b/Aircraft/c172p/c172p-set.xml
index 18941c37a..849e8bb81 100644
--- a/Aircraft/c172p/c172p-set.xml
+++ b/Aircraft/c172p/c172p-set.xml
@@ -48,7 +48,6 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
   </systems>
 
   <sound>
-   <audible archive="y">true</audible>
    <path archive="y">Aircraft/c172/c172-sound.xml</path>
   </sound>
 
diff --git a/Aircraft/ufo/ufo-set.xml b/Aircraft/ufo/ufo-set.xml
index 55a93aca3..2f9496fd4 100644
--- a/Aircraft/ufo/ufo-set.xml
+++ b/Aircraft/ufo/ufo-set.xml
@@ -9,7 +9,6 @@
   <flight-model>ufo</flight-model>
 
   <sound>
-   <audible>true</audible>
    <path>Aircraft/ufo/ufo-sound.xml</path>
   </sound>
 
diff --git a/preferences.xml b/preferences.xml
index 11fd41a96..494e7a290 100644
--- a/preferences.xml
+++ b/preferences.xml
@@ -46,7 +46,8 @@ Started September 2000 by David Megginson, david@megginson.com
   </rendering>
   <model-hz type="int">120</model-hz>
   <sound>
-   <audible type="bool">true</audible>
+   <pause type="bool">false</pause>
+   <volume type="double">1.0</volume>
    <voice type="bool">true</voice>
   </sound>
   <speed-up type="double">1.0</speed-up>