Progressive rock

Progressive rock, also known as prog rock or prog, is a rock music subgenre that originated in the United Kingdom with further developments in Germany, Italy, and France, throughout the mid-to-late 1960s and 1970s. It developed from psychedelic rock, and originated as an attempt to give greater artistic weight and credibility to rock music. Bands abandoned the short pop single in favor of instrumentation and compositional techniques more frequently associated with jazz or classical music in an effort to give rock music the same level of musical sophistication and critical respect.

Progressive rock sometimes abandons the danceable beat that defines earlier rock styles and is more likely to experiment with compositional structure, instrumentation, harmony, rhythm, and lyrical content. It may demand more effort on the part of the listener than other types of music. Musicians in progressive rock typically display a high degree of instrumental skill.Musical forms are blurred through the use of extended sections and of musical interludes that bridge separate sections, which results in classical-style suites. Early progressive rock groups expanded the timbral palette of the then-traditional rock instrumentation by adding instruments more typical of folk, jazz, or music in the classical tradition. A number of bands, especially at the genre's onset, recorded albums in which they performed with full orchestras. Progressive rock artists are more likely to explore complex time signatures such as 5/8 and 7/8.Tempo, key, and time signature changes are common within progressive rock compositions.