调试基础库为2.30  
const RecorderManager = wx.getRecorderManager()
 const options = {
    duration: 10000,
    sampleRate: 16000,
    numberOfChannels: 1,
    encodeBitRate: 48000,
    format: 'mp3'
  }
//开始录音
  RecorderManager.start(options);
  RecorderManager.onStart(()=>{
    console.log("监听到录音开始")
  })