If a saxophone is made of brass, why is it considered a woodwind instrument? When Adolphe Sax created the first saxophone, he designed a conical shape coupled with a single-reedwoodwind mouthpiece; it was because of the mouthpiece that the saxophone was classified as a woodwind instrument. Sax used brass for the body because it was easier to fashion the conical shape from metal than from wood. The designer of several instruments, Sax worked to promote them, as well. In the case of the saxophone, he prompted a contest between a traditional French military band and a band that used his saxophone. The group with the saxophone won and the new instrument was adopted into the military band. Adolphe Sax was born on this date in 1814.