<div class="inp_btn voice_btn active" id="record">
                按住 说话
            </div>

        var recorder;
        var btnRecord = $(\'#record\');
        var startTime = 0;
        var recordTimer = 300;
       var url=window.location.href;
        // 发语音
        $.ajax({
            url: \'url请求需要微信的一些东西 下面success就是返回的东西\',
            type: \'get\',
            data: { url: url },
            success: function (data) {
                var json = $.parseJSON(data);
                //alert(json);
                //假设已引入微信jssdk。【支持使用 AMD/CMD 标准模块加载方法加载】
                wx.config({
                    debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
                    appId: json.appid, // 必填，公众号的唯一标识
                    timestamp: json.timestamp, // 必填，生成签名的时间戳
                    nonceStr: json.nonceStr, // 必填，生成签名的随机串
                    signature: json.signature, // 必填，签名，见附录1
                    jsApiList: [
                    "startRecord",
                    "stopRecord",
                    "onVoiceRecordEnd",
                    "playVoice",
                    "pauseVoice",
                    "stopVoice",
                    "onVoicePlayEnd",
                    "uploadVoice",
                    "downloadVoice",
                    ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
                });
                wx.ready(function () {
                    btnRecord.on(\'touchstart\', function (event) {
                        event.preventDefault();
                        startTime = new Date().getTime();
                        // 延时后录音，避免误操作
                        recordTimer = setTimeout(function () {
                            wx.startRecord({
                                success: function () {
                                    localStorage.rainAllowRecord = \'true\';
                                    //style="display:block"
                                    $(".voice_icon").css("display", "block");
                                },
                                cancel: function () {
                                    layer.open({
                                        content: \'用户拒绝了录音授权\',
                                        btn: \'确定\',
                                        shadeClose: false,
                                    });
                                }
                            });
                        }, 300);
                    }).on(\'touchend\', function (event) {
                        event.preventDefault();
                        // 间隔太短
                        if (new Date().getTime() - startTime < 300) {
                            startTime = 0;
                            // 不录音
                            clearTimeout(recordTimer);
                        } else { // 松手结束录音
                            wx.stopRecord({
                                success: function (res) {
                                    $(".voice_icon").css("display", "none");
                                    voice.localId = res.localId;
                                    // 上传到服务器
                                    uploadVoice();
                                },
                                fail: function (res) {
                                    //alert(JSON.stringify(res));
                                    layer.open({
                                        content: JSON.stringify(res),
                                        btn: \'确定\',
                                        shadeClose: false,
                                    });
                                }
                            });
                        }
                    });
                });
            },
            error: function () { }
        })

 function uploadVoice() {
        //调用微信的上传录音接口把本地录音先上传到微信的服务器
        //不过，微信只保留3天，而我们需要长期保存，我们需要把资源从微信服务器下载到自己的服务器
        wx.uploadVoice({
            localId: voice.localId, // 需要上传的音频的本地ID，由stopRecord接口获得
            isShowProgressTips: 1, // 默认为1，显示进度提示
            success: function (res) {
                // alert(JSON.stringify(res));
                //把录音在微信服务器上的id（res.serverId）发送到自己的服务器供下载。
                voice.serverId = res.serverId;
                $.ajax({
                    url: \'/QyhSpeech/DownLoadVoice\',
                    type: \'post\',
                    data: { serverId: res.serverId, Id: Id },
                    dataType: "json",
                    success: function (data) {
                        if (data.Result == true && data.ResultCode == 1) {
                            layer.open({
                                content: "录音上传完成！",//data.Message
                                btn: \'确定\',
                                shadeClose: false,
                                yes: function (index) {
                                    window.location.href = window.location.href;
                                }
                            });
                        }
                        else {
                            layer.open({
                                content: data.Message,
                                btn: \'确定\',
                                shadeClose: false,
                            });
                        }
                    },
                    error: function (xhr, errorType, error) {
                        layer.open({
                            content: error,
                            btn: \'确定\',
                            shadeClose: false,
                        });
                    }
                });

            }
        });
    }

 //下载语音并且转换的方法
        private string GetVoicePath(string voiceId, string access_token)
        {
            string voice = "";
            try
            {
                Log.Debug("access_token:", access_token);
                //调用downloadmedia方法获得downfile对象
                DownloadFile downFile = WeiXin.DownloadMedia(voiceId, access_token);
                if (downFile.Stream != null)
                {
                    string fileName = Guid.NewGuid().ToString();
                    //生成amr文件
                    string amrPath = Server.MapPath("~/upload/audior/");
                    if (!Directory.Exists(amrPath))
                    {
                        Directory.CreateDirectory(amrPath);
                    }
                    string amrFilename = amrPath + fileName + ".amr";
                    //var ss = GetAMRFileDuration(amrFilename);
                    //Log.Debug("ss", ss.ToString());
                    using (FileStream fs = new FileStream(amrFilename, FileMode.Create))
                    {
                        byte[] datas = new byte[downFile.Stream.Length];
                        downFile.Stream.Read(datas, 0, datas.Length);
                        fs.Write(datas, 0, datas.Length);
                    }
                    //转换为mp3文件
                    string mp3Path = Server.MapPath("~/upload/audio/");
                    if (!Directory.Exists(mp3Path))
                    {
                        Directory.CreateDirectory(mp3Path);
                    }
                    string mp3Filename = mp3Path + fileName + ".mp3";
                    AudioHelper.ConvertToMp3(Server.MapPath("~/ffmpeg/"), amrFilename, mp3Filename);
                    voice = fileName;
              
                    Log.Debug("voice:", voice);
                }
            }
            catch { }
            return voice;
        }

 //下载微信语音文件
        public JsonResult DownLoadVoice()
        {
            var file = "";
            try
            {
                var serverId = Request["serverId"];//文件的serverId
                file = GetVoicePath(serverId, CacheHelper.GetAccessToken());
                return Json(new ResultJson { Message = file, Result = true, ResultCode = 1 });
            }
            catch (Exception ex)
            {
                return Json(new ResultJson { Message = ex.Message, Result = false, ResultCode = 0 });
            }

        }

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;

namespace EYO.Common
{
    /// <summary>
    /// 声音帮助类
    /// </summary>
    public sealed class AudioHelper
    {
        private const string FfmpegUsername = "ffmpeg";
        private const string FfmpegPassword = "it4pl803";

        /// <summary>
        /// 音频转换
        /// </summary>
        /// <param name="ffmpegPath">ffmpeg文件目录</param>
        /// <param name="soruceFilename">源文件</param>
        /// <param name="targetFileName">目标文件</param>
        /// <returns></returns>
        public static string ConvertToMp3(string ffmpegPath, string soruceFilename, string targetFileName)
        {
            //string cmd = ffmpegPath + @"\ffmpeg.exe -i " + soruceFilename + " " + targetFileName;
            string cmd = ffmpegPath + @"\ffmpeg.exe -i " + soruceFilename + " -ar 44100 -ab 128k " + targetFileName;
            return ConvertWithCmd(cmd);
        }

        private static string ConvertWithCmd(string cmd)
        {
            try
            {
                System.Diagnostics.Process process = new System.Diagnostics.Process();
                process.StartInfo.FileName = "cmd.exe";
                process.StartInfo.UseShellExecute = false;
                process.StartInfo.CreateNoWindow = true;
                process.StartInfo.RedirectStandardInput = true;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError = true;
                process.Start();
                process.StandardInput.WriteLine(cmd);
                process.StandardInput.AutoFlush = true;
                Thread.Sleep(1000);
                process.StandardInput.WriteLine("exit");
                process.WaitForExit();
                string outStr = process.StandardOutput.ReadToEnd();
                process.Close();
                return outStr;
            }
            catch (Exception ex)
            {
                return "error" + ex.Message;
            }
        }
    }
}