 Complete the following phrase:  The duo began recording albums; the first Chants dArgentine Songs of Argentina was released in 1954. A year later, they recorded Sous le ciel de lArgentine Under the Sky of Argentina. They also made a test recording for Folkways Records in 1955. Though American ethnomusicologist, Alan Lomax, acknowledged the quality of their music, he refused to produce it, because as members of the upper classes, their songs were not authentic. In 1956, after a 