The Jewish new year, also known as Rosh Hashanah, begins at sundown on Sunday.
In the spirit of the holiday, a rabbi in Utah decided to demonstrate the shofar, a horn used in synagogue services to announce holidays.
But his performance unexpectedly became a duet.
Click play to watch.
Watch CBN's Rosh Hashanah celebration live Sept. 16 at 7:30 p.m. ET.