recorder-core的使用方式：

1、先通过npm安装，然后通过import/require引入

//通过npm安装
npm install recorder-core

(1)引入方式1

//通过import/require引入
//必须引入的核心，换成require也是一样的。注意：recorder-core会自动往window下挂载名称为Recorder对象，全局可调用window.Recorder，也许可自行调整相关源码清除全局污染
import Recorder from 'recorder-core'
//需要使用到的音频格式编码引擎的js文件统统加载进来
import 'recorder-core/src/engine/mp3'
import 'recorder-core/src/engine/mp3-engine'

 开始录音的方法

uploadRecord() {
 // 开始录音
 var This = this;
 This.touchStart = true;
 var rec = this.rec = Recorder({
 type: "mp3",
 bitRate: 16,
 sampleRate: 48000,
 onProcess: function(buffers, powerLevel, duration, sampleRate) {
 This.duration = duration;
 This.powerLevel = powerLevel;
 }
 });
 rec.open(function() {
 uni.showToast({
 title:'开始录音',
 icon:'none'
 })
 console.log('开始录音')
 This.rec.start();
 
 This.reclog("已打开:" + This.type + " " + This.sampleRate + "hz " + This.bitRate + "kbps", 2);
 }, function(msg, isUserNotAllow) {
 // This.dialogCancel();
 console.log(msg, isUserNotAllow)
 This.reclog((isUserNotAllow ? "UserNotAllow，" : "") + "打开失败：" + msg, 1);
 });
 This.waitDialogClickFn = function() {
 // This.dialogCancel();
 This.reclog("打开失败：权限请求被忽略，用户主动点击的弹窗", 1);
 };
 
 },

结束录音的方法

h5btn_sub_stop() {
 console.log(123123)
 var This = this;
 This.touchStart = false;
 var rec = This.rec;
 This.rec = null;
 if (!rec) {
 This.reclog("未打开录音", 1);
 wx.showToast({
 title:'未开始录音'
 })
 return;
 }
 rec.stop(function(blob, duration) {
 var reader = new FileReader();
 reader.addEventListener("load", function() {
 console.log(reader)
 if (reader.result.length > 100) {
 This.he_show = true
 }
 }, false);
 reader.readAsDataURL(blob);
 console.log(blob,duration,'blob')
 let blobURL = window.URL.createObjectURL(blob)
 console.log(blobURL,'--------')
 uni.uploadFile({
 file: blob,
 name: 'file',
 formData:{
 file:blob
 },
 url:'https:xxxxxxxx/api/Upload/Upload',//上传录音的接口
 success: function(res) {
 var resData = res;
 if (resData.statusCode == 200) {
 This.audioSrc = res.data
 } else {
 uni.showToast({
 title: '文件上传过大',
 icon: 'none'
 })
 }
 },
 fail(e) {
 console.log(e,'失败原因')
 uni.showToast({
 title: '上传失败',
 icon: 'none'
 })
 },
 complete() {
 uni.hideLoading();
 }
 })
 }, function(s) {
 This.reclog("结束出错：" + s, 1);
 }, true); //自动close
 },

https://blog.csdn.net/weixin_44020340/article/details/122100100