How shofars became the spiritual soundtrack of Rosh Hashanah

A man blows a shofar, or ram's horn, during a Rosh Hashanah ritual in Israel. Ariel Schalit/AP hide caption

(RNS and NPR) It can be the small, curved horn of a ram or the dramatic spiral of an African antelope. The sound it creates is unmistakable.

Creating that sound is not difficult, but it does take some practice, said Rabbi Alicia Jo Rabins , a musician based in Portland, Oregon.

You take a deep breath and purse your lips, like you are playing a brass instrument.

Rosh Hashanah, the Jewish new year, begins at sunset Friday. Across the world, Jews will spend the two-day holiday in prayer, reflection and celebration. And for many, a highlight will be hearing the shofar: an animal's horn blown like a trumpet.

How did this primal instrument become a holiday's spiritual soundtrack?

" The most basic answer is that it makes noise, right? It calls people to attention," said Daniel Picus, an associate professor at Western Washington University in Bellingham who researches religious practices and rituals. "All of the instances in which a shofar is used in the Hebrew Bible, that is what it's doing."

Abraham Ribak , an Israeli, blows a shofar, a musical instrument used in Jewish religious ceremonies made from the horn of a ram. Ariel Schalit/AP hide caption