For most of its history, Afro-Cuban jazz had been a matter of superimposing jazz phrasing over Cuban rhythms. But by the end of the 1970s, a new generation of New York City musicians had emerged who were fluent in both salsa dance music and jazz, leading to a new level of integration of jazz and Cuban rhythms. This era of creativity and vitality is best represented by the Gonzalez brothers Jerry (congas and trumpet) and Andy (bass). During 1974–1976, they were members of one of Eddie Palmieri's most experimental salsa groups: salsa was the medium, but Palmieri was stretching the form in new ways. He incorporated parallel fourths, with McCoy Tyner-type vamps. The innovations of Palmieri, the Gonzalez brothers and others led to an Afro-Cuban jazz renaissance in New York City.