I have heard of animals being treated to some music to help them relax. Have you ever noticed your pet liking, or disliking a particular song?
My dog barks when I pause a movie or turn down the radio volume when in the car. I think that pets (in general) have an ear for sound. I have never heard of music being used to calm down a pet.
A few years ago I bought a CD that was supposed to relax dogs. It was recommended by my vet because my pup hated going so much. Playing the music made the car ride a little easier, but I don't think it made a difference once we were ready to go in.
I have a cat and I have noticed many times that she runs and hides every time I play heavy metal. I have heard about therapeutic music for animals but I am not sure which one is suitable for cats.
When I've dog-sat and cat-sat, I didn't like leaving them with the house and neighborhood quiet. I would leave on the TV or one of the YouTube channels for pets.
The question then is whether your cat is pretty cool with you when you play music on high sound or does she hide or act awkward when the music comes on?