#4754: improve winsound documentation.
diff --git a/Doc/library/winsound.rst b/Doc/library/winsound.rst
index f9709fe..b4a3391 100644
--- a/Doc/library/winsound.rst
+++ b/Doc/library/winsound.rst
@@ -30,8 +30,9 @@
Call the underlying :cfunc:`PlaySound` function from the Platform API. The
*sound* parameter may be a filename, audio data as a string, or ``None``. Its
interpretation depends on the value of *flags*, which can be a bitwise ORed
- combination of the constants described below. If the system indicates an error,
- :exc:`RuntimeError` is raised.
+ combination of the constants described below. If the *sound* parameter is
+ ``None``, any currently playing waveform sound is stopped. If the system
+ indicates an error, :exc:`RuntimeError` is raised.
.. function:: MessageBeep([type=MB_OK])
@@ -108,6 +109,10 @@
Stop playing all instances of the specified sound.
+ .. note::
+
+ This flag is not supported on modern Windows platforms.
+
.. data:: SND_ASYNC