ExoPlayer play file from assets (in this case audio, repeat for eternity)

ExoPlayerFromAssets.kt

val assetFactory = DataSource.Factory { AssetDataSource(context) }
val source = ProgressiveMediaSource.Factory(assetFactory).createMediaSource(Uri.parse("assets:///alarm_sound_1.mp3"))

val exo = SimpleExoPlayer.Builder(context).build().apply {
    repeatMode = Player.REPEAT_MODE_ALL
    volume = 1f
    audioAttributes = AudioAttributes.Builder().setContentType(C.CONTENT_TYPE_MUSIC).build()
    prepare(source)
    playWhenReady = true
}