The code below is no longer valid from audioplayers v1.0.1
final player = AudioCache(); player.play('note1.wave');
Instead U can do this
final player = AudioPlayer(); // player.play(UrlSource('note1.wave')); // If file located in assets folder like assets/sounds/note01.wave" await player.play(AssetSource('sounds/note1.wave'));
consider look in migration guide from audioplayers