Can I batch mint my music NFT?

I want to release a music NFT, one song and 30 unique pieces of art. I did the batch mint but it looks like only the art is showing, not the song? I’m assuming I have to turn all of them into an mp3 first? Sorry I’m still new here and I couldn’t find an answer on the site. Any advice is appreciated. I’m more of a creative than a dev but I know I need to learn this stuff. Thank you in advance!!!