diff --git a/README.md b/README.md
index c27c3a8..d181933 100644
--- a/README.md
+++ b/README.md
@@ -54,4 +54,8 @@ please refer to the [Koin Compose documentation](https://insert-koin.io/docs/ref
 
 For navigation, Navigation3 is used: https://kotlinlang.org/docs/multiplatform/compose-navigation-3.html
 
-For implementation details, please refer to the [Navigation3 Android documentation](https://developer.android.com/guide/navigation/navigation-3/basics).
\ No newline at end of file
+For implementation details, please refer to the [Navigation3 Android documentation](https://developer.android.com/guide/navigation/navigation-3/basics).
+
+## Audio
+
+OGG Vorbis is not correctly supported on iOS. Prefer M4A+AAC instead. For instance, audio duration is shorter on iOS with OGG. Therefore, subtitles are not correctly synchronized.
\ No newline at end of file
diff --git a/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/data/InMemoryRecordRepository.kt b/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/data/InMemoryRecordRepository.kt
index e9856d8..e30e54a 100644
--- a/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/data/InMemoryRecordRepository.kt
+++ b/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/data/InMemoryRecordRepository.kt
@@ -32,10 +32,11 @@ class InMemoryRecordRepository : RecordRepository {
             "Stad a vuhez (2)",
             "Lec'hiiñ",
         ).mapIndexed { index, title ->
+            val number = index + 1
             Record(
-                index = index + 1,
+                index = number,
                 title = title,
-                audioResourcePath = "files/$title.ogg",
+                audioResourcePath = "files/Chom_bev_${number.toString().padStart(2, '0')}.m4a",
             )
         }
 
diff --git a/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/ui/RecordView.kt b/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/ui/RecordView.kt
index 85f1d47..61f5853 100644
--- a/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/ui/RecordView.kt
+++ b/shared/src/commonMain/kotlin/fr/ajaury/gwenedeg/records/ui/RecordView.kt
@@ -40,7 +40,7 @@ fun RecordView(
 @Composable
 private fun RecordViewPreview() {
     RecordView(
-        record = Record(index = 1, title = "Sample Record", audioResourcePath = "files/An onestiz.ogg"),
+        record = Record(index = 1, title = "Sample Record", audioResourcePath = "files/Chom_bev_01.ogg"),
         onClick = {},
     )
 }