photo: ministerio de cultura de la nación · cc by-sa 2.0 ↗Gustavo Santaolalla fronted the pioneering Andean-folk-rock band Arco Iris in 1970s Buenos Aires before relocating to Los Angeles, then re-emerged in the 1990s as the producer who built the rock en español canon — shepherding landmark albums by Café Tacuba, La Maldita Vecindad, and Julieta Venegas. He later became one of film's most decorated composers, winning back-to-back Academy Awards for Brokeback Mountain and Babel, his charango-and-ronroco textures carrying forward the same Andean folk roots he nurtured since Arco Iris.
Santaolalla has called The Beatles his greatest idol growing up in 1960s Buenos Aires, absorbing their melodic songcraft even as he insisted on singing in Spanish rather than imitating them in English.
listen forListen for tightly hooked, major-key vocal melodies riding over acoustic strumming — pop economy borrowed from Beatles songcraft, grafted onto Andean and Latin American folk textures.
Santaolalla has repeatedly named Atahualpa Yupanqui among the music he grew up on, and Arco Iris's fusion of rock instrumentation with Andean folklore — later distilled into his solo charango and ronroco work — descends directly from Yupanqui's austere guitar-and-voice vocabulary.
listen forListen for the same high-plains melancholy in both: modal melodies, sparse texture, an unhurried sense of open space — carried by a bare guitar in Yupanqui's recordings and by a charango or ronroco in Santaolalla's.
Alongside the British Invasion, Santaolalla has cited listening to Crosby, Stills, Nash & Young during his formative years — part of the American folk-rock he blended with Argentine folklore in Arco Iris.
listen forListen for stacked, close vocal harmonies riding over acoustic guitar — the same folk-rock choir effect CSNY popularized — laid over unmistakably Latin American rhythms and instrumentation.