a saxophone sounds. Classical mouthpieces generally help produce a warmer and rounder tone, while jazz mouthpieces generally help produce a brighter and edgier tone. Materials used in mouthpiece construction include plastic, ebonite and various metals, for example bronze, brass and stainless steel. The mouthpiece of the tenor saxophone is proportionally larger than that of the alto, necessitating a similarly larger reed. The increased stiffness of the reed and the greater airflow required to establish resonance in the larger body means the tenor sax requires greater lung power but a looser embouchure than the higher-pitched members of the saxophone family. The tenor sax reed is similar in size to that used in the bass clarinet, and the two can be easily substituted. Uses The tenor saxophone first gained popularity in one of its original intended roles: the military band. Soon after its invention, French and Belgian military bands began to take full advantage of the instrument which Sax had designed specifically for them. Modern military bands typically incorporate a quartet of saxophone players playing the E baritone, tenor, E alto and B soprano. British military bands customarily make use only of the tenor and alto saxes, with two or more musicians on each instrument. The tenor is used in classical music. It is a standard instrument in concert bands and saxophone quartets. It also has a body of solo repertoire. The tenor is sometimes used as a member of the orchestra in pieces such as Sergei Prokofiev's "Romeo and Juliet" and "Lieutenant Kijé Suite" and Maurice Ravel's "Boléro". Charles Ives employs a tenor in his Fourth Symphony. Vincent d'Indy wrote for a tenor in his opera Fervaal. Lukas Foss includes a tenor in his Symphony No. 2. Bela Bartok used the tenor and other saxes in his ballet The Wooden Prince. Igor Stravinsky has two tenors performing in his Ebony Concerto. Much of the popularity of saxophones in the United States derives from the large number of military bands that were around at the time of the American Civil War. After the war, former military band instruments found their way into the hands of the general public, where they were often used to play gospel music and jazz. The work of the pioneering bandleader Patrick Gilmore (1829–1892) was highly influential; he was one of the first arrangers to pit brass instruments (trumpet, trombone and cornet) against reeds (clarinet and saxophone) in