He joined singer Carlos Gardel on a duo until 1925 when Razzano left due to vocal cord problems.

When his father died two years later, his mother moved to Buenos Aires, establishing in Balvanera district.

He also performed on Justicia Humana by Agustín Fontanella impersonating "Juancho" and singing payada with Damián Méndez in Calandria written by Martiniano Leguizamón.

Razzano's prominent fame resulted in the signing of his first contract with Argentine filial of Victor Talking Machine Company in 1912.

[1] The popularity of the Gardel-Razzano duo was in crescendo, touring on Uruguay, Brazil, Chile and Spain until 1925 when Razzano left his singing career due to throat problems.