Herz’s repertoire is extremely rich in top quality instrumental Brazilian. His excellent repertoire ranges from Northeastern rhythms to choro, samba and its numerous variants. His research and deep knowledge of Brazilian music inspired his second solo album, Brasil em 3 por 4, including famous popular waltzes by composers such as Milton Nascimento, Pixinguinha and Djavan. Experimenting in his home studio, Ricardo recorded all the violins on this album. He plays the bass, the solos and everything else. He says: “I’ve always wanted to record a solo album playing in duos, trios and quartets, all by myself!”, he laughs. The album was released in September 2007.