Classify the following instruments as either brass or woodwind: Alto Saxophone, Trumpet, Clarinet, Oboe, Trombone, Horn, Drums.

Of the given list, the Alto Saxophone, Clarinet, and Oboe are woodwind instruments because they all generate sound with a reed. Contrarily, the Trumpet, Trombone, and Horn are brass instruments. This family's instruments are made of brass, and the players vibrate their lips to produce a sound. The drum is neither a woodwind nor a brass instrument but part of the percussion instrument family.