Blob to Wav JavaScript

function makeLink(){  let blob = new Blob(chunks, {type: media.type })    , Url = URL.createObjectURL(blob)    , li = document.createElement('li')    , mt = document.createElement(media.tag)    , hf = document.createElement('a');    mt.controls = true;  mt.src = Url;  hf.href = Url;  hf.download = `${counter++}${media.ext}`;  hf.innerHTML = `donwload ${hf.download}`;  let formData = new FormData();  formData.append(audio, blob, 'audio.wav');  let x='test'  $.ajax({    type:'GET',    url:'/answer/voice',    data: formData,    contentType: false,    processData: false,    success:function(result) {      $("#chatbox").append('<p class ="userText"><audio style="background-color:white;" controls> <source src="' + Url+ '" type="audio/wav"></audio></p>');      $("#chatbox").append('<p class ="botText"><span>' + result.emotion+ '</span></p>');      $("#textInput").val("")    },    error:function(result){      alert('sorry an error occured');    }  });}
siam88