diff --git a/src/main/java/device/usbPlayer/UsbPlayer.java b/src/main/java/device/usbPlayer/UsbPlayer.java
index 8e38ed0..41189a4 100644
--- a/src/main/java/device/usbPlayer/UsbPlayer.java
+++ b/src/main/java/device/usbPlayer/UsbPlayer.java
@@ -69,14 +69,14 @@ public class UsbPlayer implements Device {
 
     }
     //**********search method*************
-    private boolean isAllAudio() {
+    public boolean isAllAudio() {
 
         String song = "";
         boolean flag = true;
 
         for (int i = 0; i < Playlist.size(); i++) {
             song = Playlist.get(i).substring(Playlist.get(i).length() - 4);
-            if (song.equals(".mp3") | song.equals(".mp4") | song.equals(".wav")) {
+            if (song.equals(".mp3") ) {
                 flag = true;
             } else {
                 flag = false;
diff --git a/src/test/java/device/usbPlayer/UsbPlayerTest.java b/src/test/java/device/usbPlayer/UsbPlayerTest.java
index 2a613fb..5f09063 100644
--- a/src/test/java/device/usbPlayer/UsbPlayerTest.java
+++ b/src/test/java/device/usbPlayer/UsbPlayerTest.java
@@ -242,5 +242,22 @@ void louderTest(String testName, UsbPlayer inputPlay, int expectedResult) {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("isAllAudioOptions")
+    void isAllAudioTest(String testName, boolean inputTestResult, boolean expectedResult) {
+       // String current_Track = inputPlay.getPlayTrack();
+        assertThat(inputTestResult).describedAs(testName).isEqualTo(expectedResult);
+    }
+
+    static Stream<Arguments> isAllAudioOptions() {
+        UsbPlayer up1 = new UsbPlayer();
+        //up1.GoTo("Musik 03.mp3");
+
+        return Stream.of(
+                Arguments.of("Go to Song : Musik 03.mp3 ", up1.isAllAudio(), true)
+
+        );
+    }
+
 
 }
\ No newline at end of file