audio changes

App/Frontend/screens/PhoneticWordsScreen.js

@@ -17,12 +17,12 @@ const PhoneticWordsScreen = () => {
   const woodboardPath = './assets/ST/woodboard.png';
 
   const audioFiles = {
-    battle: require('./assets/ST/content/battle.mp3'),
-    kettle: require('./assets/ST/content/kettle.mp3'),
-    bottle: require('./assets/ST/content/bottle.mp3'),
-    rat: require('./assets/ST/content/rat.mp3'),
-    bat: require('./assets/ST/content/bat.mp3'),
-    cat: require('./assets/ST/content/cat.mp3'),
+    battle: require('./assets/ST/content/battle.m4a'),
+    kettle: require('./assets/ST/content/kettle.m4a'),
+    bottle: require('./assets/ST/content/bottle.m4a'),
+    rat: require('./assets/ST/content/rat.m4a'),
+    bat: require('./assets/ST/content/bat.m4a'),
+    cat: require('./assets/ST/content/cat.m4a'),
   };
 
   useEffect(() => {