Call SoundSystem instead

Content.Client/Audio/ContentAudioSystem.cs

@@ -1,15 +0,0 @@
-using Content.Shared.Physics;
-using Robust.Client.GameObjects;
-using Robust.Shared.GameObjects;
-
-namespace Content.Client.Audio
-{
-    public sealed class ContentAudioSystem : EntitySystem
-    {
-        public override void Initialize()
-        {
-            base.Initialize();
-            Get<AudioSystem>().OcclusionCollisionMask = (int) CollisionGroup.Impassable;
-        }
-    }
-}

Content.Shared/Audio/ContentAudioSystem.cs

@@ -0,0 +1,15 @@
+using Content.Shared.Physics;
+using Robust.Shared.Audio;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.Audio
+{
+    public class ContentAudioSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+            SoundSystem.OcclusionCollisionMask = (int) CollisionGroup.Impassable;
+        }
+    }
+}