diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index f7028b1..c36a786 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -10,6 +10,10 @@ using System.IO;
 using ZXing.Common; // Para DecodingOptions y otros
 using ZXing.Windows.Compatibility;
 using BarcodeReader = ZXing.OpenCV.BarcodeReader;  // Asegúrate de añadir este using
+using System.Media;
+using System.Windows.Controls;
+using Brushes = System.Windows.Media.Brushes;
+
 
 namespace QRReaderFromAndroid
 {
@@ -22,6 +26,8 @@ namespace QRReaderFromAndroid
         private BarcodeReader _reader;
         private HashSet<string> _scannedBarcodes = new HashSet<string>();
         private const string FilePath = "scanned_barcodes.txt";
+        private SoundPlayer _soundPlayer = new SoundPlayer("D:\\Proyectos\\VisualStudio\\QRReaderFromAndroid\\store-scanner-beep-90395.wav"); // Configura la ruta al archivo de sonido
+
 
         public MainWindow()
         {
@@ -61,21 +67,46 @@ namespace QRReaderFromAndroid
                 {
                     var bitmap = OpenCvSharp.Extensions.BitmapConverter.ToBitmap(frame);
                     var result = ScanBarcode(bitmap);
-                    if (result != null && result.Text.Length == 13 && _scannedBarcodes.Add(result.Text))
+                    if (result != null && result.Text.Length == 13)
                     {
                         // Actualizar UI de forma segura
+                        barcodeText.Text = $"Scanned: {result.Text}";
                         Dispatcher.Invoke(() =>
                         {
-                            barcodeList.Items.Add(result.Text);
-                            barcodeText.Text = $"Scanned: {result.Text}";
-                        });
-                        SaveBarcode(result.Text);
+                            if (!_scannedBarcodes.Contains(result.Text))
+                            {
+                                _scannedBarcodes.Add(result.Text);
+                                AddBarcodeToList(result.Text);
+                                SaveBarcode(result.Text);
+                                _soundPlayer.Play();
+                            }
+                            else
+                            {
+                                SelectBarcodeInList(result.Text);
+                                //_soundPlayer.Play();
+                            }
+                        });                        
                     }
                     cameraImage.Source = BitmapToImageSource(bitmap);
                 }
             }
         }
 
+        private void AddBarcodeToList(string barcode)
+        {
+            barcodeList.Items.Add(barcode);
+        }
+
+        private void SelectBarcodeInList(string barcode)
+        {
+            int index = barcodeList.Items.IndexOf(barcode);
+            if (index != -1)
+            {
+                barcodeList.SelectedIndex = index;
+                barcodeList.ScrollIntoView(barcodeList.SelectedItem); // Asegura que el ítem seleccionado sea visible
+            }
+        }
+
         private void LoadScannedBarcodes()
         {
             if (File.Exists(FilePath))
diff --git a/store-scanner-beep-90395.mp3 b/store-scanner-beep-90395.mp3
new file mode 100644
index 0000000..ac50b9c
Binary files /dev/null and b/store-scanner-beep-90395.mp3 differ
diff --git a/store-scanner-beep-90395.wav b/store-scanner-beep-90395.wav
new file mode 100644
index 0000000..38bd324
Binary files /dev/null and b/store-scanner-beep-90395.wav differ