The shawm was a medieval and Renaissance musical instrument of the woodwind family made in Europe from the 12th century (at the latest) until the 17th century. It was developed from the oriental zurna and is the predecessor of the modern oboe. The body of the shawm was usually turned from a single piece of wood, and terminated in a flared bell somewhat like that of a trumpet. Beginning in the 16th century, shawms were made in several sizes, from sopranino to great bass, and four and five-part music could be played by a consort consisting entirely of shawms.

All later shawms had at least one key allowing a downward extension of the compass; the keywork was typically covered by a perforated wooden cover called the fontanelle. The bassoon-like double reed, made from the same Arundo donax cane used for oboes and bassoons, was inserted directly into a socket at the top of the instrument, or in the larger types, on the end of a metal tube called the bocal. The pirouette, a small cylindrical piece of wood with a hole in the middle resembling a thimble, was placed over the reed—this acted as a support for the lips and embouchure.

Since only a short portion of the reed protruded past the pirouette, the player had only limited contact with the reed, and therefore limited control of dynamics. The shawm’s conical bore and flaring bell, combined with the style of playing dictated by the use of a pirouette, gave the instrument a piercing, trumpet-like sound well-suited for out-of-doors performance.