Need help in retrieving data from recording_url from Ticket Audit API

I am trying to develop a ticket sidebar app and I would like to have the mp3 file of the call recording when I get it from the Ticket Audits API. I need to use this mp3 file to submit as a file in another form-data api call. However, what I can only get is the binary data which I cannot use and process as an mp3 file. This topic is the exact same thing that I have:

https://support.zendesk.com/hc/en-us/community/posts/4408861014298-Voice-Recording-URL-not-returning-valid-Data

Hope you can help me on this. Thanks.