Reverting doc rename

doc/examples/sound/lib/main.dart

@@ -0,0 +1,59 @@
+import 'package:flame/flame.dart';
+import 'package:flame/game.dart';
+import 'package:flame/components/component.dart';
+import 'package:flutter/material.dart';
+
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  final Size size = await Flame.util.initialDimensions();
+  runApp(MyGame(size).widget);
+}
+
+class Ball extends PositionComponent {
+  final Size gameSize;
+  final paint = Paint()..color = const Color(0xFFFFFFFF);
+
+  bool forward = true;
+
+  Ball(this.gameSize);
+
+  @override
+  void render(Canvas c) {
+    c.drawOval(toRect(), paint);
+  }
+
+  @override
+  void update(double delta) {
+    x += (forward ? 1 : -1) * 100 * delta;
+
+    if (x <= 0 || x + width >= gameSize.width) {
+      if (forward) {
+        x = gameSize.width - width - 1;
+      } else {
+        x = 1;
+      }
+
+      forward = !forward;
+      print('boin');
+      Flame.audio.play('boin.mp3', volume: 1.0);
+    }
+  }
+}
+
+class MyGame extends BaseGame {
+  MyGame(Size screenSize) {
+    size = screenSize;
+    _start();
+  }
+
+  void _start() async {
+    Flame.audio.disableLog();
+    Flame.audio.load('boin.mp3');
+    Flame.audio.loop('music.mp3', volume: 0.4);
+
+    add(Ball(size)
+      ..y = (size.height / 2) - 50
+      ..width = 100
+      ..height = 100);
+  }
+}