Who did Luis Gianneo teach, who became considered a chief exponent of Argentine folk music?
Luis Gianneo Luis Gianneo (1897–1968) was an Argentine composer, pianist and conductor. As music educator, he was the teacher of composers Ariel Ramirez, Juan Carlos Zorzi, Virtú Maragno, Pedro Ignacio Calderón and Rodolfo Arizaga, among others.
Tango music Tango is a style of music in  or  time that originated among European immigrant populations of Argentina (collectively, the "Rioplatenses"). It is traditionally played on a solo guitar, guitar duo, or an ensemble, known as the "orquesta típica", which includes at least two violins, flute, piano, double bass, and at least two bandoneóns. Sometimes guitars and a clarinet join the ensemble. Tango may be purely instrumental or may include a vocalist. Tango music and dance have become popular throughout the world.