接口说明地址：https://ai.baidu.com/docs#/TTS-Online-Csharp-SDK/top

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Baidu.Aip.Speech;
using System.IO;

namespace VIKI_BAIDU_TTS
{
    public partial class Form1 : Form
    { 
         
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {

            if (textBox1.Text.Trim() == "") {

                MessageBox.Show("请收入需要转写的文字内容");
                textBox1.Focus();
                return;
            }

            SaveFileDialog dialog = new SaveFileDialog();
            dialog.Filter = "All files (*.*)|*.*|wav files (*.wav)|*.wav";
            dialog.Title = "保存WAV文件";
            dialog.FilterIndex = 2;
            dialog.RestoreDirectory = true;

            if (dialog.ShowDialog() == DialogResult.OK)
            {
                int t = Tts(dialog.FileName,textBox1.Text.Trim());

                if (t == 1)
                {
                    MessageBox.Show("合成成功");
                }
                else {
                    MessageBox.Show("合成失败");
                }

            }
        }

        // 合成
        public int Tts(string strFileName, string strTTS)
        {
            // 设置APPID/AK/SK
            var APP_ID = "";
            var API_KEY = "";
            var SECRET_KEY = "";

            var client = new Baidu.Aip.Speech.Tts(API_KEY, SECRET_KEY);

            client.Timeout = 60000;  // 修改超时时间

            // 可选参数
            var option = new Dictionary<string, object>()
            {
                {"spd", Convert.ToInt32(com_spd.Text.Trim())}, // 语速
                {"vol", Convert.ToInt32(com_vol.Text.Trim())}, // 音量
                {"pit", Convert.ToInt32(com_pit.Text.Trim())}, // 音调
                {"per", Convert.ToInt32(com_per.Text.Trim())}  // 发音人，4：情感度丫丫童声

            };

            var result = client.Synthesis(strTTS, option);

            if (result.ErrorCode == 0)  
            {
                File.WriteAllBytes(strFileName, result.Data);
                return 1;
            }

            return 0;
        }

    }
}



VIKI-BAIDU-TTS.zip