SystemSpeechRecognizer and MicrosoftSpeechRecognizer originating times may be inaccurate

[chitsaw]

Sometimes the speech recognition results emitted by the SystemSpeechRecognizer and MicrosoftSpeechRecognizer components have incorrect originating timestamps which may be slightly off when compared against the input audio stream (i.e. the results appear to be shifted in time). This may be related to the way in which the originating times of the recognition results are estimated from the underlying recognition engine's internal audio offset position.