add sample

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

zh-cn/application-dev/media/audio-playback.md

@@ -256,4 +256,10 @@ await fileIO.open(path).then(fdNumber) => {
 
 audioPlayer.src = fdPath;                           //设置src属性，并触发'dataLoad'事件回调
 audioPlayer.loop = true;                            //设置循环播放属性
-```
+```
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+
+## 相关实例
+
+针对音频播放开发，有以下相关实例可供参考：
+
+- [`JsDistributedMusicPlayer`：分布式音乐播放（JS）（API7）](https://gitee.com/openharmony/app_samples/tree/master/ability/JsDistributedMusicPlayer)
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