That.
And what Muddy said. A song (or verse) will pop into my head and stay for a while, until something takes its place.
I like music, but never needed it on cycling workouts or for hiking.
I do like to listen to books, but wouldn't do that on a hike. After the hike, I could tell you about the book(s), but I couldn't tell you about my walk. I'm out there for the experience. Listening to music or books would take away from that. For me.