diff --git a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
index 41979ab357..c004e194d3 100644
--- a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
+++ b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
@@ -302,7 +302,6 @@
     <Compile Include="Traits\PowerTooltip.cs" />
     <Compile Include="Traits\VeteranProductionIconOverlay.cs" />
     <Compile Include="Traits\Capturable.cs" />
-    <Compile Include="Traits\CaptureNotification.cs" />
     <Compile Include="Traits\Captures.cs" />
     <Compile Include="Traits\Cargo.cs" />
     <Compile Include="Traits\CashTrickler.cs" />
@@ -473,6 +472,7 @@
     <Compile Include="Traits\Sound\AnnounceOnBuild.cs" />
     <Compile Include="Traits\Sound\AnnounceOnKill.cs" />
     <Compile Include="Traits\Sound\AnnounceOnSeen.cs" />
+    <Compile Include="Traits\Sound\CaptureNotification.cs" />
     <Compile Include="Traits\Sound\DeathSounds.cs" />
     <Compile Include="Traits\Sound\SoundOnDamageTransition.cs" />
     <Compile Include="Traits\SupplyTruck.cs" />
diff --git a/OpenRA.Mods.Common/Traits/Player/EnemyWatcher.cs b/OpenRA.Mods.Common/Traits/Player/EnemyWatcher.cs
index fe9b210101..1ab5c5d560 100644
--- a/OpenRA.Mods.Common/Traits/Player/EnemyWatcher.cs
+++ b/OpenRA.Mods.Common/Traits/Player/EnemyWatcher.cs
@@ -10,6 +10,7 @@
 #endregion
 
 using System.Collections.Generic;
+using OpenRA.Mods.Common.Traits.Sound;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
diff --git a/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs b/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs
index d4b03341fa..6a56b41c33 100644
--- a/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/ActorLostNotification.cs
@@ -11,7 +11,7 @@
 
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	class ActorLostNotificationInfo : ITraitInfo
 	{
diff --git a/OpenRA.Mods.Common/Traits/Sound/AmbientSound.cs b/OpenRA.Mods.Common/Traits/Sound/AmbientSound.cs
index 9702652f2d..ecc872432d 100644
--- a/OpenRA.Mods.Common/Traits/Sound/AmbientSound.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/AmbientSound.cs
@@ -11,7 +11,7 @@
 
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	[Desc("Plays a looping audio file at the actor position. Attach this to the `World` actor to cover the whole map.")]
 	class AmbientSoundInfo : UpgradableTraitInfo
diff --git a/OpenRA.Mods.Common/Traits/Sound/AnnounceOnBuild.cs b/OpenRA.Mods.Common/Traits/Sound/AnnounceOnBuild.cs
index 86c6998aea..c2c1bc6293 100644
--- a/OpenRA.Mods.Common/Traits/Sound/AnnounceOnBuild.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/AnnounceOnBuild.cs
@@ -11,7 +11,7 @@
 
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	[Desc("Play the Build voice of this actor when trained.")]
 	public class AnnounceOnBuildInfo : ITraitInfo
diff --git a/OpenRA.Mods.Common/Traits/Sound/AnnounceOnKill.cs b/OpenRA.Mods.Common/Traits/Sound/AnnounceOnKill.cs
index 7d08690094..071ab07a78 100644
--- a/OpenRA.Mods.Common/Traits/Sound/AnnounceOnKill.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/AnnounceOnKill.cs
@@ -11,7 +11,7 @@
 
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	[Desc("Play the Kill voice of this actor when eliminating enemies.")]
 	public class AnnounceOnKillInfo : ITraitInfo
diff --git a/OpenRA.Mods.Common/Traits/Sound/AnnounceOnSeen.cs b/OpenRA.Mods.Common/Traits/Sound/AnnounceOnSeen.cs
index 1d78723149..ce7f6c89e0 100644
--- a/OpenRA.Mods.Common/Traits/Sound/AnnounceOnSeen.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/AnnounceOnSeen.cs
@@ -13,7 +13,7 @@ using System;
 using System.Drawing;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	[Desc("Players will be notified when this actor becomes visible to them.")]
 	public class AnnounceOnSeenInfo : ITraitInfo
diff --git a/OpenRA.Mods.Common/Traits/CaptureNotification.cs b/OpenRA.Mods.Common/Traits/Sound/CaptureNotification.cs
similarity index 96%
rename from OpenRA.Mods.Common/Traits/CaptureNotification.cs
rename to OpenRA.Mods.Common/Traits/Sound/CaptureNotification.cs
index 59bc73676d..109c6d649c 100644
--- a/OpenRA.Mods.Common/Traits/CaptureNotification.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/CaptureNotification.cs
@@ -11,7 +11,7 @@
 
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	public class CaptureNotificationInfo : ITraitInfo
 	{
diff --git a/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs b/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs
index 36031c9b0e..42ee6d52d7 100644
--- a/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/DeathSounds.cs
@@ -13,7 +13,7 @@ using System.Collections.Generic;
 using OpenRA.Mods.Common.Warheads;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	[Desc("Sounds to play when killed.")]
 	public class DeathSoundsInfo : ITraitInfo
diff --git a/OpenRA.Mods.Common/Traits/Sound/SoundOnDamageTransition.cs b/OpenRA.Mods.Common/Traits/Sound/SoundOnDamageTransition.cs
index 44ec4d2385..27f9a37b59 100644
--- a/OpenRA.Mods.Common/Traits/Sound/SoundOnDamageTransition.cs
+++ b/OpenRA.Mods.Common/Traits/Sound/SoundOnDamageTransition.cs
@@ -11,7 +11,7 @@
 
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.Common.Traits
+namespace OpenRA.Mods.Common.Traits.Sound
 {
 	public class SoundOnDamageTransitionInfo : ITraitInfo
 	{