The shofar is one of the oldest wind instruments still in use, mentioned in the Hebrew Bible and traditionally fashioned from a kosher animal horn, most often a ram. It is blown in synagogues during the month of Elul, on Rosh Hashanah, and at the close of Yom Kippur, following prescribed patterns of short and long blasts. Its call is associated with repentance, remembrance and spiritual awakening. Recordings are now widely shared online for holiday lessons, services and edits that need that historic, unmistakable sound.