** Lists the four possible audio input and output states.** ** `http://msdn.microsoft.com/en-us/library/ee125190%28v=vs.85%29.aspx`enum class SpeechAudioState {** Audio is stopped and closed. For multimedia audio input devices (sound cards etc.), the ** device will be released. It can be opened by other processes and potentially made ** unavailable to SAPI.**** Value is 0 (0x0) SASClosed,** Audio is stopped. For multimedia audio input devices (sound cards etc.), the audio device ** will not be closed. This guarantees that SAPI can restart it without an intervening process ** opening it.**** Value is 1 (0x1) SASStop,** Audio is paused. Staying in this state for too long a period will cause audio loss.**** Value is 2 (0x2) SASPause,** Audio is enabled. **** Value is 3 (0x3) SASRun;}