一開始我是這樣寫的
//發出提示音
var audioPlayer = AudioPlayer();
audioPlayer.setPlayerMode(PlayerMode.lowLatency);
audioPlayer.setReleaseMode(ReleaseMode.loop);
audioPlayer.play(AssetSource('sounds/1.mp3'));
可是它不停的報錯：
Unhandled Exception: Unable to load asset:
這是我的目錄
後來在源碼中仔細研究了一番
// read local asset from rootBundle
final byteData = await rootBundle.load('$prefix$fileName');
```dart
發現有個prefix
在往上看
```dart
/// This is the path inside your assets folder where your files lie.
///
/// For example, Flame uses the prefix 'assets/audio/'
/// (you must include the final slash!).
/// The default prefix (if not provided) is 'assets/'
/// Your files will be found at <prefix><fileName> (so the trailing slash is
/// crucial).
String prefix;
AudioCache({this.prefix = 'assets/'});
原來如此，它默認的根目錄是 assets/
可以選擇將音頻文件移動到 assets / 中，也可以直接修改這個 perfix
audioPlayer.audioCache.prefix = '';
加上⬆️這一行就可以了
最終代碼⬇️
//發出提示音
var audioPlayer = AudioPlayer();
audioPlayer.setPlayerMode(PlayerMode.lowLatency);
audioPlayer.setReleaseMode(ReleaseMode.loop);
audioPlayer.audioCache.prefix = '';
audioPlayer.play(AssetSource('sounds/1.mp3'));