Calamaro's keen appreciation of Argentina's musical history is apparent in low-profile tracks like his respectful version of Leon Gieco's "Algún Lugar Encontraré." And "Siete segundos / El día que me quieras" pairs a piano-accompanied acoustic version of a Calamaro original with a venerable tango by Carlos Gardel and Alfredo Le Pera, both sung in the rocker's cracked rasp.