of the clave to the other without breaking its rhythmic integrity within the structure of a musical arrangement. Music director Mario Bauzá and lead vocalist Machito promoted a standard of excellence for subsequent band leaders, such as José Curbelo, Tito Puente, Marcelino Guerra, Tito Rodriguez, and Elmo Garcia. Although it could be argued that Xavier Cugat established such a standard much earlier with his orchestra at the Waldorf Astoria Hotel (1931), the sound emulated by bandleaders in New York City was different from Cugat's. Cugat performed for the high society of New York City, not the Latino community in East Harlem (El Barrio) and the South Bronx. Cugat's music was one they may have heard on the radio, but this community had little access to it. The Machito Afro-Cubans provided a forum for progressive musical ideas, compositions, and arrangements. They explored the fusion of Afro Cuban music with jazz arranging and jazz-oriented soloists in a multiracial framework. Bauzá developed the 3-2/2-3 clave concept and terminology. A chord progression can begin on either side of clave. When the progression begins on the three-side, the song or song section is said to be in 3-2 clave. When the chord progression begins on the two-side, it is in 2-3 clave. In North America, salsa and Latin jazz charts commonly represent clave in two measures of cut-time (2/2); this is most likely the influence of jazz conventions. When clave is written in two measures (above), changing from one clave sequence to the other is a matter of reversing the order of the measures. Bauzá balanced Latin and jazz musicians in Machito's band to realize his vision of Afro-Cuban jazz. He mastered both types of music, but it took time for him to teach the jazz musicians in Machito's band about clave. When trumpeter Doc Cheatham joined the band, Machito fired him after two nights because he couldn't cope with clave. Dizzy Gillespie and Chano Pozo Mario Bauzá introduced bebop innovator Dizzy Gillespie to the Cuban conga drummer, dancer, composer, and choreographer Chano Pozo. The brief collaboration of Gillespie and Pozo produced some of the most enduring Afro-Cuban jazz standards. "Manteca" (1947), co-written by Gillespie and Pozo, is the first jazz standard to be rhythmically based on clave. According to Gillespie, Pozo composed the layered, contrapuntal guajeos (Afro-Cuban ostinatos) of the A section and the introduction, while Gillespie wrote the bridge. Gillespie recounted: "If I'd