在3.1中使用SimpleAudioEngine播放mp3音效的时候报错：
2014-07-17 14:35:48.516 zombie_iOS 14:35:48.516 ERROR: 185: Error creating aggregate audio device: 'nope'
2014-07-17 14:35:48.516 zombie_iOS 14:35:48.516 WARNING: 219: The input device is 0x39; 'AppleHDAEngineInput:1B,0,1,0:1'
2014-07-17 14:35:48.517 zombie_iOS 14:35:48.517 WARNING: 223: The output device is 0x2f; 'AppleHDAEngineOutput:1B,0,1,1:0'
2014-07-17 14:35:48.517 zombie_iOS 14:35:48.517 ERROR: 398: error 'nope'
2014-07-17 14:35:48.517 zombie_iOS 14:35:48.517 ERROR: >aurioc> 783: failed: -10851 (enable 2, outf< 2 ch, 44100 Hz, Int16, inter> inf< 2 ch, 0 Hz, Int16, inter>)
2014-07-17 14:35:48.518 zombie_iOS 14:35:48.518 ERROR: 398: error -66680
请问有人知道这个是什么问题，怎么解决吗？