iOS后台使用音频播放功能被拒

Guideline 2.5.4 - Performance - Software Requirements

Your app declares support for audio in the UIBackgroundModes key in your Info.plist but did not include features that require persistent audio.

Next Steps

The audio key is intended for use by apps that provide audible content to the user while in the background, such as music player or streaming audio apps. Please revise your app to provide audible content to the user while the app is in the background or remove the "audio" setting from the UIBackgroundModes key.

之前因2.5.4被拒，后来录了操作视频审核通过，而且中途还更新了几个版本，最近不知道怎么搞的不让你过，一直都是2.5.4，求大神告知怎么才能通过审核，我功能就是定时器，数据改变播放音频。