As I speak, I'm thinking of one of my favorite songs, which is Riverman by Nick Drake. It always makes me feel calm and happy. So music changes our mood. However, it's not the only sound that does that. There are plenty of sounds in nature that do that. Bird songs, for example, make us feel relaxed and reassured because we have been learned over hundreds of and thousands of years. Again, that when the birds are singing, we are normally pretty safe