Most know Mr. Santamaria for two things: his version of Herbie Hancock's song "Watermelon Man," which became a top-10 hit in 1963, and his authorship of "Afro Blue," a song John Coltrane made famous. But those more familiar with Afro-Cuban music know that Mr. Santamaria was at the middle of the shift from the Afro-Cuban jazz of the 1950's to the salsa sound of the 1970's.