Regex to get music download link

I want to say trying to generate a music library based from the rss feeds i subscribe to.
right now i’m trying to write a script that will find only the links to mp3 files, but i’m having problem with the regex
looks like this right now, does not give a match.$string = “here is my test link link”;

Hi,

Could you provide an example of the string you have, as well as what you are trying to match.

E.g.

String: “<p>This is a great song. You can download it <a href=“download.com/song”>here</a></p>”
Want to match: “download.com/song