Hi akaniklaus,
Can you describe more specifically which aspect of that task you are having difficulty with and in what area of the implementation? If I were doing this I guess I would put the utterances in an NSMutableDictionary as they come in, or possible write them out to a plist or some combination of the above depending on the eventual use of the data. I presume that you know the expected recognition, and the utterance id (a good key for the dictionary entry), the hypothesis, and the confidence score are all delivered by the OpenEarsEventsObserver method.