Rock

Rock music (often referred to as rock n roll, rock) is a form of popular music from the mid 20th century which typically features a vocal melody (often with vocal harmony) that is supported by accomp

Rock music (often referred to as rock n roll, rock) is a form of popular music from the mid 20th century which typically features a vocal melody (often with vocal harmony) that is supported by accompaniment of electric guitars, a bass guitar, and drums, often with a strong back beat. Keyboard instruments such as organ, piano, or synthesizers are often used in many types of rock music. While brass and woodwind instruments, such as saxophone were common in some styles in earlier development of rock, they are less common in the newer subgenres of rock music since the 1990s. The genre of rock music is broad, and its boundaries loosely-defined, with related genres such as soul and funk sometimes being included in the definition of the term.

A major formative influence on rock was rock and roll, and rockabilly. In the 1960s, as British rock developed, the term "rock music" became popular. With the "British Invasion" this reinvigorated musical style spread back to the United States, and became an international cultural phenomenon with considerable social impact. Rock has evolved into a multitude of highly-varying styles with widespread popularity.