Caraduras literally translates to "hard-faced" but is used to describe someone who is shameless, cheeky, or brazen. It's a colorful and informal word that captures a specific personality trait.
In the song, it's used to describe the band members who, despite being untalented and unprepared, boldly went on stage. "Eran muy caraduras y muy desafinados" (They were very shameless and very out of tune) perfectly illustrates their audacious spirit, making it an interesting and memorable word choice.
Have you ever dreamed of being in a band, even if you're not exactly a musical prodigy? Los Auténticos Decadentes, with Cacho Castaña, totally get it in "Y la Banda Sigue" [And the Band Plays On]. It tells the hilarious story of a group of friends from the neighborhood who had a band but had "nunca había tocado" [never played]. Their big motivation? They wanted to play "para no laborar" [to not work]! They barely rehearsed, were "muy caraduras y muy desafinados" [very cheeky and very out of tune], and "sonaban mal" [sounded bad].
But here's the best part: despite all that, the audience loved them! At the end of their first show, "El público aplaudía pedían una mas" [The public applauded, asking for one more]. From there, these "valientes mercenarios" [brave mercenaries] took their show on the road, playing everywhere from a "Festipunk" to a "Bar Mitzvah" and even the famous "Luna Park." No matter where they played, "Todos se divertían, pedían una mas" [Everyone had fun, asking for one more]. It's a fun, feel-good anthem about embracing your imperfections and just going for it, because sometimes, even if you're a bit out of tune, "la banda sigue, tocando" [the band plays on, singing]!