How do you write an mp3 or playable file when getting voice-input from an user

let receiver = connection.receiver
  let stream
  receiver.speaking.on("start", userid => {
    let user = client.users.cache.get(userid)
    console.log(user.tag)
    stream = receiver.subscribe(user.id).pipe(fs.createWriteStream(`c:/Bots/PartyMode/recordings/${user.id}.pcm`)).on("close", () => {
      console.log("closed")
    })
  })
  receiver.speaking.on("end", userid => {
    receiver.voiceConnection.destroy()
    stream.close()
  })

let receiver = connection.receiver
  let stream
  receiver.speaking.on("start", userid => {
    let user = client.users.cache.get(userid)
    console.log(user.tag)
    stream = receiver.subscribe(user.id).pipe(fs.createWriteStream(`c:/Bots/PartyMode/recordings/${user.id}.pcm`)).on("close", () => {
      console.log("closed")
    })
  })
  receiver.speaking.on("end", userid => {
    receiver.voiceConnection.destroy()
    stream.close()
  })