 Horacio Gianello replaced Alberto Cascino at the drums, and in 1971 Arco Iris began releasing a series of singles.Eventually the band began working on their second album, which would be released in 1972 but now under the Music Hall Label.However, RCA also came out with a compilation of B-sides from the band, including some in the English language, creating some confusion even to this day about the order of the various releases.