diff --git a/docs/entity_media_player.md b/docs/entity_media_player.md
index a2798bac..3729096c 100644
--- a/docs/entity_media_player.md
+++ b/docs/entity_media_player.md
@@ -11,6 +11,19 @@ sidebar_label: Media Player
 
 | Name | Type | Default | Description
 | ---- | ---- | ------- | -----------
+| sound_mode | string | None | The current sound mode of the media player
+| sound_mode_list | list | None | Dynamic list of available sound modes (set by platform, empty means sound mode not supported)
+
 
 ## Methods
+### Select sound mode
+Optional. Switch the sound mode of the media player.
 
+    class MyMediaPlayer(MediaPlayerDevice):
+      # Implement one of these methods.
+      
+      def select_sound_mode(self, sound_mode):
+          """Switch the sound mode of the entity."""
+
+      def async_select_sound_mode(self, sound_mode):
+         """Switch the sound mode of the entity."""