The upright bass, also known as the double bass, is the largest string instrument in the orchestral family. It has four strings, typically tuned in perfect fourths, and is played with a bow or by plucking the strings. The instrument produces deep, resonant sounds and is essential in various music genres, including classical, jazz, and folk. The upright bass is often used in orchestras to provide the bass line and support harmonies. Its size and shape allow it to produce a wide range of tones, making it versatile for both solo performances and ensemble settings. Musicians can play it standing up or seated, depending on the context.