Soft rock (also known as light rock) is a form of rock music that originated in the late 1960s in Southern California and the United Kingdom which smoothed over the edges of singer-songwriter and pop rock, relying on simple, melodic songs with big, lush productions. Soft rock was prevalent on the radio throughout the 1970s and eventually metamorphosed into a form of the synthesized music of adult contemporary in the 1980s. Source: Wikipedia (en)