Also, Erin had plenty of human music that hadn't been on Celestia's and Luna's tablet. For the most part, the songs were much shorter and much more energetic, though Twilight couldn't say that she enjoyed all of them. Some of it just sounded like random noises and crashes, making her lay her ears back in annoyance.  In the future, she’d probably just stick to listening to the classical. It was much more familiar, even though it had a slightly odd sound to it compared to what she was used to. 