audio_merge.dart

 Configuration createConfiguration() {

    // final flutterSticker = Sticker(
    //     "example_sticker_logos_flutter", "Flutter", "assets/Flutter-logo.png");
    // final imglySticker = Sticker(
    //     "example_sticker_logos_imgly", "img.ly", "assets/IgorSticker.png");

    /// A completely custom category.
    // final logos = StickerCategory(
    //     "example_sticker_category_logos", "Logos", "assets/Flutter-logo.png",
    //     items: [flutterSticker, imglySticker]);

    /// A predefined category.
    final emoticons = StickerCategory.existing("imgly_sticker_category_emoticons");

    /// A customized predefined category.
    final shapes = StickerCategory.existing("imgly_sticker_category_shapes", items: [
      Sticker.existing("imgly_sticker_shapes_badge_01"),
      Sticker.existing("imgly_sticker_shapes_arrow_02")
    ]);
    var categories = <StickerCategory>[emoticons, shapes];
    
     
    final audio = AudioOptions(
      canvasActions: [
        AudioCanvasAction.delete,
        AudioCanvasAction.playPause
      ],
      categories: [
        AudioClipCategory(
          '${DateTime.now().millisecondsSinceEpoch}', 
          'audio-1', 
          items: [
            AudioClip('audio-clip-1', 'https://cdn.trendybeatz.com/audio/Praiz-Save-Us-(TrendyBeatz.com).mp3')
          ]
        )
      ]
    );
    final configuration =
        Configuration(sticker: StickerOptions(personalStickers: true, categories: categories, ), audio: audio);
    return configuration;
  }