In the wake of jazz fusion's decline in the mid-1970s, jazz artists who continued to seek wider audiences began incorporating a variety of popular sounds into their music, forming a group of accessible styles that became known as crossover jazz. Influential saxophonist Grover Washington, Jr. incorporated elements of funk and R&B into a sound based in hard bop, while singer Al Jarreau blurred the lines between jazz, pop, and soul. Other artists, such as The Rippingtons and Spyro Gyra, injected their pop-flavored instrumentals with Latin rhythms and electronic keyboards. Jamaican saxophonists Tommy McCook and Rolando Alphonso and keyboardist Jackie Mittoo fused roots reggae rhythm with jazz harmonies and extended improvisation. Unlike the related genre smooth jazz, crossover jazz retains an emphasis on improvisation but attempts to make that improvisation commercially successful by couching it in a variety of marketable formats.