Smooth jazz may be thought of as commercially-oriented, crossover jazz which came to prominence in the 1980s, displacing the more venturesome
jazz fusion from which it emerged. It avoids the
improvisational "risk-taking" of jazz fusion, emphasizing melodic form, and much of the music was initially "a combination of jazz with easy-listening
pop music and lightweight
R&B." During the mid-1970s in the United States, it was known as "smooth radio"; the genre was not termed "smooth jazz" until the 1980s. The term itself seems to have been birthed directly out of radio marketing efforts. In an industry focus group in the late 1980s, one participant coined the phrase "smooth jazz" and it stuck. The popularity of smooth jazz as a radio format grew in the '80s and '90s, but gradually declined in the early 2000s. By 2009, many stations including in NYC, Washington, DC, and Boston had switched away from the format. ==Pioneers and notable songs==