Prune most yml ambientsound entries (#8573)

Content.Client/Audio/AmbientSoundSystem.cs

@@ -2,6 +2,7 @@ using System.Collections.Generic;
 using System.Linq;
 using Content.Shared.Audio;
 using Content.Shared.CCVar;
+using Robust.Client.Graphics;
 using Robust.Client.Player;
 using Robust.Shared.Audio;
 using Robust.Shared.Configuration;
@@ -29,8 +30,9 @@ namespace Content.Client.Audio
         [Dependency] private readonly IPlayerManager _playerManager = default!;
         [Dependency] private readonly IRobustRandom _random = default!;
 
+        private AmbientSoundOverlay? _overlay;
         private int _maxAmbientCount;
-
+        private bool _overlayEnabled;
         private float _maxAmbientRange;
         private float _cooldown;
         private float _accumulator;
@@ -45,7 +47,37 @@ namespace Content.Client.Audio
 
         private const float RangeBuffer = 3f;
 
+        public bool OverlayEnabled
+        {
+            get => _overlayEnabled;
+            set
+            {
+                if (_overlayEnabled == value) return;
+                _overlayEnabled = value;
+                var overlayManager = IoCManager.Resolve<IOverlayManager>();
 
+                if (_overlayEnabled)
+                {
+                    _overlay = new AmbientSoundOverlay(EntityManager, this, Get<EntityLookupSystem>());
+                    overlayManager.AddOverlay(_overlay);
+                }
+                else
+                {
+                    overlayManager.RemoveOverlay(_overlay!);
+                    _overlay = null;
+                }
+            }
+        }
+
+        /// <summary>
+        /// Is this AmbientSound actively playing right now?
+        /// </summary>
+        /// <param name="component"></param>
+        /// <returns></returns>
+        public bool IsActive(AmbientSoundComponent component)
+        {
+            return _playingSounds.ContainsKey(component);
+        }
 
         public override void Initialize()
         {