diff --git a/vna_system/core/acquisition/data_acquisition.py b/vna_system/core/acquisition/data_acquisition.py
index 795b405..553f0a5 100644
--- a/vna_system/core/acquisition/data_acquisition.py
+++ b/vna_system/core/acquisition/data_acquisition.py
@@ -38,7 +38,7 @@ class VNADataAcquisition:
         self._sweep_buffer = SweepBuffer()
 
         # Sound player for sweep notifications
-        sound_file = Path(cfg.BASE_DIR) / "core" / "sound_sample.mp3"
+        sound_file = Path(cfg.BASE_DIR) / "core" / "sound_sample.wav"
         self._sound_player = SoundPlayer(sound_file)
 
         # Simulator mode
diff --git a/vna_system/core/sound_sample.wav b/vna_system/core/sound_sample.wav
new file mode 100644
index 0000000..ea970b7
Binary files /dev/null and b/vna_system/core/sound_sample.wav differ