If you want to include elements of music or audio in your fanfiction, you can try describing or referencing specific songs or musical pieces by their titles or artists within the text of your story. Some writers add notes to readers on external websites or video-sharing platforms where these songs can be accessed independently.
For example, you might say, "John put on his headphones and listened to 'Sweet Child o' Mine' by Guns N' Roses as he drove down the highway." or reference a particular section or theme from a musical piece without directly embedding it.