title: how to convert a BLOB object (audio) in a normal audio like .mp3 or .wav for update to database
body: <p>I want update An audio recorded with the microphone to my firebase database
  , but I get an BLOB object and I take the url like this blob:<a href="http://localhost:3000/b890eafb-2265-458e-a9d8-84b81657d7fb" rel="nofollow noreferrer">http://localhost:3000/b890eafb-2265-458e-a9d8-84b81657d7fb</a> but if I want play this audio in other computer not heard. </p>
  
  <p>And the only thing I can think of is to convert it to .mp3 or .wav and upload it</p>