Ios 如何使用带Swift的MazingAudioEngine播放音频文件？

我需要用mazingaudioengine

框架和
Swift
播放单个音频文件。
我是这个框架的新手，尝试了下面的代码，但是音频没有播放。怎么了？如何播放音频文件

do {
    var audioController = AEAudioController(audioDescription: AEAudioController.nonInterleavedFloatStereoAudioDescription())
    let file = NSBundle.mainBundle().URLForResource("myaudiofile", withExtension: "wav")!
    let channel = try AEAudioFilePlayer(URL: file)
    audioController?.addChannels([channel])
    channel.playAtTime(0)
} catch {
    print("Failure")
}

我没有启动
音频控制器
：

do {
    var audioController = AEAudioController(audioDescription: AEAudioController.nonInterleavedFloatStereoAudioDescription())
    let file = NSBundle.mainBundle().URLForResource("myaudiofile", withExtension: "wav")!
    let channel = try AEAudioFilePlayer(URL: file)
    audioController?.addChannels([channel])
    try audioController!.start()
} catch {
    print("Failure")
}