How about surprising her with tickets to her favorite artist or band's upcoming concert? If possible, you can also make it into a weekend getaway by booking a hotel room and exploring the area before or after the concert.
Another idea is to gift her with a personalized concert poster of a show she attended or a framed album cover from her favorite artist's discography.
You could also consider signing her up for a subscription service that sends her monthly vinyl records or CDs from her favorite genres or artists so she can enjoy new music whenever she wants.
Or you can get her a star map with the date of your anniversary.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.