Strange error on AudioQueueEnqueueBufferWithParameters
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Guys I'm getting following `kAudioQueueErr_QueueInvalidated` error return value   on `AudioQueueEnqueueBufferWithParameters`. 

In corresponding header file `kAudioQueueErr_QueueInvalidated` stands for - `On iPhoneOS, the audio server has exited, causing this audio queue to have become invalid.`

Any ideas why this takes place ? In what cases the audio server exites ? 