diff --git a/program/SoundLopper.cs b/program/SoundLopper.cs
index a0e79cf..311d4b6 100644
--- a/program/SoundLopper.cs
+++ b/program/SoundLopper.cs
@@ -1,19 +1,33 @@
 using System;
 using System.Diagnostics;
 using System.IO;
+using System.Media;
 using System.Threading;
 
 public class SoundLooper : IDisposable
 {
+    // ── unix backend ──
     private Process _proc;
-    private Thread _thread;
+    private Thread  _thread;
     private volatile bool _running;
-    private string _path;
+    private string  _path;
+
+    // ── windows backend ──
+    private SoundPlayer _player;
 
     public event Action<string> Log;
 
     public bool IsPlaying { get { return _running; } }
 
+    private static bool IsWindows
+    {
+        get
+        {
+            var p = Environment.OSVersion.Platform;
+            return p != PlatformID.Unix && p != PlatformID.MacOSX;
+        }
+    }
+
     public void Start(string wavPath)
     {
         Stop();
@@ -25,11 +39,9 @@
         }
 
         _path = wavPath;
-        _running = true;
-        _thread = new Thread(LoopWorker);
-        _thread.IsBackground = true;
-        _thread.Start();
-        Emit("Looping started: " + wavPath);
+
+        if (IsWindows) StartWindows();
+        else           StartUnix();
     }
 
     public void Stop()
@@ -37,22 +49,58 @@
         if (!_running) return;
         _running = false;
 
+        if (_player != null)
+        {
+            try { _player.Stop(); } catch { }
+            try { _player.Dispose(); } catch { }
+            _player = null;
+        }
+
         try
         {
             var p = _proc;
             if (p != null && !p.HasExited) p.Kill();
         }
         catch { }
-
         _proc = null;
 
-        if (_thread != null && _thread.IsAlive)
-            _thread.Join(500);
-
+        if (_thread != null && _thread.IsAlive) _thread.Join(500);
         _thread = null;
+
         Emit("Looping stopped");
     }
 
+    // ── windows: SoundPlayer loops natively, no thread needed ──────────
+
+    private void StartWindows()
+    {
+        try
+        {
+            _player = new SoundPlayer(_path);
+            _player.Load();          // throws here if the WAV isn't plain PCM
+            _player.PlayLooping();   // gapless, runs until Stop()
+            _running = true;
+            Emit("Looping started (SoundPlayer): " + _path);
+        }
+        catch (Exception ex)
+        {
+            Emit("SoundPlayer failed for " + _path + ": " + ex.Message);
+            _player = null;
+            _running = false;
+        }
+    }
+
+    // ── unix: respawn a CLI player each pass ───────────────────────────
+
+    private void StartUnix()
+    {
+        _running = true;
+        _thread = new Thread(LoopWorker);
+        _thread.IsBackground = true;
+        _thread.Start();
+        Emit("Looping started (" + PlayerCommand() + "): " + _path);
+    }
+
     private void LoopWorker()
     {
         while (_running)
@@ -81,12 +129,12 @@
         }
     }
 
-    private static string _player;
+    private static string _player_cmd;
     private static string PlayerCommand()
     {
-        if (_player != null) return _player;
-        _player = Exists("paplay") ? "paplay" : "aplay";
-        return _player;
+        if (_player_cmd != null) return _player_cmd;
+        _player_cmd = Exists("paplay") ? "paplay" : "aplay";
+        return _player_cmd;
     }
 
     private static bool Exists(string cmd)