British Invasion: An influx of British bands in the early 1960s whose styles borrowed from American pop, rock and roll, rhythm and blues, and early blues and who, in turn, were to have a profound influences in the emergence of rock.
Concept Album: A rock-era album which represented a unified artistic vision rather than a compilation of a group or individual’s songs.
Modal Harmony: Chords built from modal scales, rather than major and minor scales. Modal scales are common in British folk music.
Motown Sound: A set of stylistic features heard in sixties Motown recordings: melodic saturation, a good mellow beat, a broad spectrum of sound and a predictable format.
Psychedelic Rock (Acid Rock): A rock substyle defined not by a musical feature but simply by the music’s ability to evoke or enhance the drug experience.
Rock Beat: Eight evenly spaced sounds per measure (or two per beat) over a strong backbeat.
Soul: A term used widely in the 1960s by both white and black Americans to describe popular music by African Americans, particularly music, like that of James Brown, marginally influenced by pop or white rock styles.