imported main menu scene addon

evolve-die-repeat/addons/maaacks_game_template/docs/AddingUISFX.md

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+# Adding UI Sound Effects
+
+This page covers adding sound effects to common UI elements like buttons and sliders.
+
+1.  Verify the `Music` and `SFX` audio busses.
+
+    1.  Open the Audio bus editor.
+    2.  Confirm that `Music` and `SFX` audio busses are available.
+        1.  If the last bus is `New Bus`, try restarting the editor and checking again.
+    3.  If the audio bus doesn't exist, add it and save the project.
+
+
+1.  Add UI sound effects:
+    1.  By scene.
+
+
+        1.  Open `main_menu_with_animations.tscn` and `pause_menu.tscn`.
+        2.  In the Scene Tree, select the `UISoundController` node.
+        3.  In the Inspector, add audio streams to the various UI node events.
+        4.  Save the scenes.  
+
+
+    2.  Project-wide.
+
+
+        1.  Open `project_ui_sound_controller.tscn`.
+        2.  In the Scene Tree, select the `UISoundController` node.
+        3.  In the Inspector, add audio streams to the various UI node events.
+        4.  Save the scene.