* \a update_audio_file is non-NULL, the function it points to gets called
* whenever a new audio file was successfully loaded and is going to be
* streamed by any of paraslash's senders. The full path of the audio file is
* \a update_audio_file is non-NULL, the function it points to gets called
* whenever a new audio file was successfully loaded and is going to be
* streamed by any of paraslash's senders. The full path of the audio file is