C#实现文本语音互转

下载SAPI：

   1）SpeechSDK51.exe                   

   2）SpeechSDK51LangPack.exe 

   下载地址

文字转语音：

   1）在COM选项卡里面的Microsoft Speech  object  library引用 

   2）using SpeechLib;

   3）SpVoiceClass voice = new SpVoiceClass();//SAPI 5.1

       SpVoice voice = new SpVoice();//SAPI 5.4

   4）voice.Voice = voice.GetVoices(string.Empty, string.Empty).Item(3);

   5）voice.Speak("你好世界");

语音转文字：

public class SpRecognition
    {
        private static SpRecognition _Instance = null;
        private SpeechLib.ISpeechRecoGrammar isrg;
        private SpeechLib.SpSharedRecoContextClass ssrContex = null;
        public delegate void StringEvent(string str);
        public StringEvent SetMessage;
        private SpRecognition()
        {
            ssrContex = new SpSharedRecoContextClass();
            isrg = ssrContex.CreateGrammar(1);
            SpeechLib._ISpeechRecoContextEvents_RecognitionEventHandler recHandle =
                 new _ISpeechRecoContextEvents_RecognitionEventHandler(ContexRecognition);
            ssrContex.Recognition += recHandle;
        }
        public void BeginRec()
        {
            isrg.DictationSetState(SpeechRuleState.SGDSActive);
        }
        public static SpRecognition instance()
        {
            if (_Instance == null)
                _Instance = new SpRecognition();
            return _Instance;
        }
        public void CloseRec()
        {
            isrg.DictationSetState(SpeechRuleState.SGDSInactive);
        }
        private void ContexRecognition(int iIndex, object obj, SpeechLib.SpeechRecognitionType type, SpeechLib.ISpeechRecoResult result)
        {
            if (SetMessage != null)
            {
                SetMessage(result.PhraseInfo.GetText(0, -1, true));
            }
        }
    }