diff --git a/Assets/Cryville.EEW.Unity/TTSWorker.cs b/Assets/Cryville.EEW.Unity/TTSWorker.cs
index 5227e77..667c19d 100644
--- a/Assets/Cryville.EEW.Unity/TTSWorker.cs
+++ b/Assets/Cryville.EEW.Unity/TTSWorker.cs
@@ -1,3 +1,4 @@
+using SpeechLib;
 using System;
 using System.Globalization;
 using System.Threading;
@@ -5,7 +6,14 @@ using System.Threading.Tasks;
 
 namespace Cryville.EEW.Unity {
 	class TTSWorker : Core.Audio.TTSWorker {
-		public TTSWorker() : base(CreateSoundPlayer()) { }
+		readonly SpVoiceClass _voice;
+
+		public TTSWorker() : base(CreateSoundPlayer()) {
+			try {
+				_voice = new SpVoiceClass();
+			}
+			catch { }
+		}
 
 		static SoundPlayer CreateSoundPlayer() {
 			try {
@@ -16,10 +24,24 @@ namespace Cryville.EEW.Unity {
 			}
 		}
 
-		protected override bool IsSpeaking() => false;
+		protected override bool IsSpeaking() {
+			if (_voice == null) return false;
+			_voice.GetStatus(out var status, out _);
+			return (status.dwRunningState & (uint)SpeechRunState.SRSEIsSpeaking) != 0;
+		}
 
-		protected override Task Speak(CultureInfo culture, string content, CancellationToken cancellationToken) => Task.CompletedTask;
+		protected override Task Speak(CultureInfo culture, string content, CancellationToken cancellationToken) {
+			if (_voice == null) return Task.CompletedTask;
+			_voice.Speak(
+				string.Format(CultureInfo.InvariantCulture, "<LANG LANGID=\"{0:x}\">{1}</LANG>", culture.LCID, content),
+				SpeechVoiceSpeakFlags.SVSFlagsAsync | SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak
+			);
+			return Task.CompletedTask;
+		}
 
-		protected override void StopCurrent() { }
+		protected override void StopCurrent() {
+			if (_voice == null) return;
+			_voice.Skip("SENTENCE", int.MaxValue);
+		}
 	}
 }
diff --git a/Assets/Plugins/Windows/Interop.SpeechLib.dll b/Assets/Plugins/Windows/Interop.SpeechLib.dll
new file mode 100644
index 0000000..c5c5fc2
Binary files /dev/null and b/Assets/Plugins/Windows/Interop.SpeechLib.dll differ
diff --git a/Assets/Plugins/Windows/Interop.SpeechLib.dll.meta b/Assets/Plugins/Windows/Interop.SpeechLib.dll.meta
new file mode 100644
index 0000000..9ac294d
--- /dev/null
+++ b/Assets/Plugins/Windows/Interop.SpeechLib.dll.meta
@@ -0,0 +1,76 @@
+fileFormatVersion: 2
+guid: 17df7db50754b8f459aa29934b507000
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 0
+  isExplicitlyReferenced: 0
+  validateReferences: 1
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+        Exclude OSXUniversal: 1
+        Exclude Win: 0
+        Exclude Win64: 0
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+      Android: Android
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+        OS: AnyOS
+  - first:
+      Standalone: Linux64
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+  - first:
+      Standalone: OSXUniversal
+    second:
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+  - first:
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+    second:
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+      settings:
+        CPU: x86
+  - first:
+      Standalone: Win64
+    second:
+      enabled: 1
+      settings:
+        CPU: x86_64
+  - first:
+      Windows Store Apps: WindowsStoreApps
+    second:
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+  userData: 
+  assetBundleName: 
+  assetBundleVariant: