Rock-a-Cha-Cha: The Erased Impact of Latin American Music on the Rhythmic Transformation of US Popular Music

This article interrogates an overlooked claim made by Mario Bauzá, that the impact of Latin American musics on a fundamental change in the rhythm of twentieth-century music has been written out of history. After presenting four original analytical definitions, a corpus analysis establishes that a transition occurred from swung-quaver, compound-metre, and crotchet ‘monorhythm’ to straight-quaver polyrhythm in US popular music, culminating in early 1960s rock ’n’ roll. Focusing on Paul Anka's ‘Diana’ and the style ‘rock-a-cha-cha’, a combination of music analysis and reception history demonstrates that Afro-Latin musics were the predominant influence on the rhythmic transformation – which was erased by rock historians, influenced by three factors. This impact of Latin American music and migration is theorized in terms of cosmopolitanism. The article concludes that the impact of Latin American music on the United States is not a superficial ‘tinge’: it prompted a paradigm shift in the rhythm of twentieth-century music.