The double bass, also called the upright bass or contrabass, is the largest and lowest-pitched bowed string instrument in the modern symphony orchestra. The name, “double bass,” derives from the early use of the instrument to double—an octave lower where possible the bass part written for the cello. It is a standard member of the string section of the symphony orchestra and smaller string ensembles in Western classical music. In addition, it is used in other genres such as jazz, 1950s-style blues and rock and roll, rockabilly/psychobilly, bluegrass, and tango. In jazz music, the bass is mostly plucked, except for some solos (and also occasional written parts in modern jazz) which are performed with the bow. In most other genres, such as blues and rockabilly, the bass is plucked.