More refactors

Content.Shared/GameObjects/Components/Instruments/SharedInstrumentComponent.cs

@@ -9,6 +9,10 @@ namespace Content.Shared.GameObjects.Components.Instruments
     {
         public override string Name => "Instrument";
         public override uint? NetID => ContentNetIDs.INSTRUMENTS;
+
+        public virtual void Update(float delta)
+        {
+        }
     }
 
 
@@ -20,6 +24,14 @@ namespace Content.Shared.GameObjects.Components.Instruments
     {
     }
 
+    /// <summary>
+    ///     This message is sent to the client to start the synth.
+    /// </summary>
+    [Serializable, NetSerializable]
+    public class InstrumentStartMidiMessage : ComponentMessage
+    {
+    }
+
     /// <summary>
     ///     This message carries a MidiEvent to be played on clients.
     /// </summary>

Content.Shared/GameObjects/EntitySystems/SharedInstrumentSystem.cs

@@ -1,15 +1,15 @@
-using Content.Client.GameObjects.Components.Instruments;
+using Content.Shared.GameObjects.Components.Instruments;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Systems;
 
-namespace Content.Client.GameObjects.EntitySystems
+namespace Content.Shared.GameObjects.EntitySystems
 {
     public class InstrumentSystem : EntitySystem
     {
         public override void Initialize()
         {
             base.Initialize();
-            EntityQuery = new TypeEntityQuery(typeof(InstrumentComponent));
+            EntityQuery = new TypeEntityQuery(typeof(SharedInstrumentComponent));
         }
 
         public override void Update(float frameTime)
@@ -18,7 +18,7 @@ namespace Content.Client.GameObjects.EntitySystems
 
             foreach (var entity in RelevantEntities)
             {
-                entity.GetComponent<InstrumentComponent>().Update(frameTime);
+                entity.GetComponent<SharedInstrumentComponent>().Update(frameTime);
             }
         }
     }