Noted that the module was added in 1.5.2.

Doc/lib/libwinsound.tex

@@ -6,6 +6,7 @@
 \moduleauthor{Toby Dickenson}{htrd90@zepler.org}
 \sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
 
+\versionadded{1.5.2}
 
 The \module{winsound} module provides access to the basic
 sound-playing machinery provided by Windows platforms.  It includes a