C# 利用TTS实现文本转语音

TSS（Text To Speech），语音朗读文本的技术，在Windows下台下，微软给我们提供了一套API接口（Speech API）。金山词霸的朗读功能就是用的这个接口。

WindowsXP自带的是Speech API 5.1版本，默认只支持英文，如果要支持中文需要安装语音库。

Speech API 5.1 官方下载地址

Speech API 5.1 中文语音库官方下载地址

Vista版本开始，系统自带的Speech API就换成了5.3版本，比较奇怪的是这个API并没有做到向下兼容，5.3版本在Vista以下的版本是不可用的。

有一些非官方的Windows优化版本去掉了语音功能，需要对系统进行修复。
TTS修复工具及一些其他的语音库下载
http://www.dacidian.net/tts/

下面我说一下如何实现，使用.NET 4.0新增的dynamic类型，可以很方便的使用COM类库。

Type type = Type.GetTypeFromProgID("SAPI.SpVoice");
dynamic spVoice = Activator.CreateInstance(type);
spVoice.Speak("Text To Speech 语音朗读文本技术");

当然，直接使用dynamic还是很不方便的，可以对SAPI.SpVoice进行封装

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.Diagnostics;
using System.Runtime.InteropServices;  

namespace COM
{
    [Guid("ED5DCE10-F40B-4655-9E7B-903779C77AF2")]
    public partial class SpVoice : Object
    {
        public enum Flags
        {
            SVSFDefault = ,
            SVSFlagsAsync = ,
            SVSFPurgeBeforeSpeak = ,
            SVSFIsFilename = ,
            SVSFIsXML = ,
            SVSFIsNotXML = ,
            SVSFPersistXML = ,
            SVSFNLPSpeakPunc = ,
            SVSFParseSapi = ,
            SVSFParseSsml = ,
            SVSFParseAutodetect = ,
            SVSFNLPMask = ,
            SVSFParseMask = ,
            SVSFVoiceMask = ,
            SVSFUnusedFlags = -
        }  

        public enum Priority
        {
            SVPNormal = ,
            SVPAlert = ,
            SVPOver =
        }
    }
    public partial class SpVoice : Object
    {
        private Type _ComType = null;
        private object _ComObject = null;  

        public SpVoice()
        {
            this.Init();
        }  

        public bool Init()
        {
            this._ComType = Type.GetTypeFromProgID("SAPI.SpVoice", true); // CLSID {269316D8-57BD-11D2-9EEE-00C04F797396}
            if (this._ComType == null) {
                throw new Exception("COM调用失败");
            }
            this._ComObject = Activator.CreateInstance(this._ComType, true);
            return this._ComObject != null;
        }  

        public int Release()
        {
            return Marshal.ReleaseComObject(this._ComObject);
        }  

        public int Rate
        {
            get {
                return (int)this._ComType.InvokeMember("Rate", BindingFlags.GetProperty, null, this._ComObject, null);
            }
            set {
                this._ComType.InvokeMember("Rate", BindingFlags.SetProperty, null, this._ComObject, new object[] { value });
            }
        }  

        public void Pause()
        {
            this._ComType.InvokeMember("Pause", BindingFlags.InvokeMethod, null, this._ComObject, null);
        }  

        public void Resume()
        {
            this._ComType.InvokeMember("Resume", BindingFlags.InvokeMethod, null, this._ComObject, null);
        }  

        public int Volume
        {
            get
            {
                return (int)this._ComType.InvokeMember("Volume", BindingFlags.GetProperty, null, this._ComObject, null);
            }
            set
            {
                this._ComType.InvokeMember("Volume", BindingFlags.SetProperty, null, this._ComObject, new object[] { value });
            }
        }  

        public int Skip(int Type, int NumItems)
        {
            return (int)this._ComType.InvokeMember("Skip", BindingFlags.InvokeMethod, null, this._ComObject, new object[] { Type, NumItems });
        }  

        public bool IsUISupported(string TypeOfUI, object ExtraData)
        {
            return (bool)this._ComType.InvokeMember("IsUISupported", BindingFlags.InvokeMethod, null, this._ComObject, new object[] { TypeOfUI, ExtraData });
        }  

        public bool WaitUntilDone(int msTimeout) {
            return (bool)this._ComType.InvokeMember("WaitUntilDone", BindingFlags.InvokeMethod, null, this._ComObject, new object[] { msTimeout });
        }  

        public void DisplayUI(int hWndParent, string Title, string TypeOfUI, object ExtraData)
        {
            this._ComType.InvokeMember("DisplayUI", BindingFlags.InvokeMethod, null, this._ComObject, new object[] { hWndParent, Title, TypeOfUI, ExtraData });
        }  

        public void Speak(string Text, Flags Flags)
        {
            this._ComType.InvokeMember("Speak", BindingFlags.InvokeMethod, null, this._ComObject, new object[] { Text, Flags });
        }  

        public Priority Property
        {
            get {
                return (Priority)this._ComType.InvokeMember("Priority", BindingFlags.GetProperty, null, this._ComObject, null);
            }
            set {
                this._ComType.InvokeMember("Priority", BindingFlags.SetProperty, null, this._ComType, new object[] { value });
            }
        }  

        public List<string> GetVoices()
        {
            List<string> _ret = null;
            object Item = null, _Voices = this._ComType.InvokeMember("GetVoices", BindingFlags.InvokeMethod, null, this._ComObject, null);
            int Count = (int)_Voices.GetType().InvokeMember("Count", BindingFlags.GetProperty, null, _Voices, null);
            if (Count != ) {
                _ret = new List<string>();
            }
            for (int i = ; i < Count; i++) {
                Item = _Voices.GetType().InvokeMember("Item", BindingFlags.InvokeMethod, null, _Voices, new object[]{ i });
                if (Item != null) {
                    _ret.Add(Item.GetType().InvokeMember("GetDescription", BindingFlags.InvokeMethod, null, Item, null).ToString());
                }
            }
            return _ret;
        }  

        public bool SetVoices(string Name)
        {
            bool _ret = false;
            object Item = null, _Voices = this._ComType.InvokeMember("GetVoices", BindingFlags.InvokeMethod, null, this._ComObject, null);
            int Count = (int)_Voices.GetType().InvokeMember("Count", BindingFlags.GetProperty, null, _Voices, null);
            for (int i = ; i < Count; i++) {
                Item = _Voices.GetType().InvokeMember("Item", BindingFlags.InvokeMethod, null, _Voices, new object[] { i });
                if (Item != null) {
                    var _str = Item.GetType().InvokeMember("GetDescription", BindingFlags.InvokeMethod, null, Item, null).ToString();
                    if (_str == Name) {
                        this._ComType.InvokeMember("Voice", BindingFlags.SetProperty, null, this._ComObject, new object[] { Item });
                    }
                }
            }
            return _ret;
        }
    }
}
转载于http://blog.csdn.net/windowsvipcuvs/article/details/30751707

这样使用起来就比较方便

var spVoices = new SpVoice()
{
    Rate = -,
    Volume =
};
spVoices.SetVoices(spVoices.GetVoices()[]);
spVoices.Speak(speak, SpVoice.Flags.SVSFlagsAsync);