Music differs by country, culture, etc. but I agree that it is a universal language. For instance, I am a violinist and traveled to a country a few years back where I did not speak their language. Yet, the orchestra I visited played Shostakovich, which is a name known throughout the classical world. I didn't speak a word of their language, but yet we were all able to it down and read the same music. So in that regard, it absolutely is.