A microphone is required for this scene to function properly.
Add the Assets/Ride/Examples/Speech/SpeechRecognizer/SpeechManager.prefab to enable the service and Assets/Ride/Examples/Speech/SpeechRecognizer/SpeechRecognitionMenuobject.prefab into the scene in order to provide an interface for the user.
Reference ExampleSpeechRecognizer.cs to see how the speech recognizer service is setup.