How can i make a dinamic List<Audio> audioList?

[Ednokia777]

How can i make List audioList [
....
]
with dynamic data from json? I've already realized it in 'for' but it doesn't work correct

final AssetsAudioPlayer audioPlayer = AssetsAudioPlayer();
  final SwiperController swiperController = SwiperController();
  double screenWidth = 0;
  double screenHeight = 0;
  var currentSongs;
  Color highlightColor = Colors.white;
  var audio;
  var title;
  var subtitle;
  var image;
  late List allSongs = [];
  List<Audio> audioList = [];


  @override
  void dispose() {
    audioPlayer.stop();
    super.dispose();
  }

  @override
  void initState() {
    setupPlaylist();
    super.initState();
  }

  void setupPlaylist() async {
    currentSongs = widget.data['index'];
    allSongs = widget.data['songs'];
    for (var i = 0; i < allSongs.length; i++) {
      audio = allSongs[i]['fields']['audio'][0]['url'].toString();
      title = allSongs[i]['fields']['name'].toString();
      subtitle = allSongs[i]['fields']['type'].toString();
      image = allSongs[i]['fields']['cover'][0]['url'].toString();
      audioList.add(
        Audio.network(
            audio, metas: Metas(
            title: title,
            artist: subtitle,
            image: MetasImage.file(image)
        )
        ),
      );
    }
    audioPlayer.open(
      Playlist(audios: audioList, startIndex: currentSongs),
      autoStart: false,
      showNotification: true,
      loopMode: LoopMode.none

    );
  }

I used it https://github.com/FlorianPruemer/flutter_tutorials/blob/master/audio_players/lib/design_examples/episode6_playlist_view.dart

Help me, please.