formation of professional technicians linked to sound activities, as well as for singers, arrangers and composers. From this scenario, broadcasters Ademar Casé (in Rio) and César Ladeira{{refn|(...) Committed to valuing her artists, Ladeira innovated in presenting them by epithets or catchphrases: 'Remarkable Little Girl' designated to Carmem Miranda; ‘The singer of the thousand and one fans’ designated to Ciro Monteiro; and ‘the singer who dispensed with adjectives’ designated to Carlos Galhardo."|group=nb}} (in São Paulo) stood out as pioneers in the establishment of exclusive contracts with singers for presentation in live programs. That is, instead of receiving only one fee per presentation, the monthly remuneration was fixed to pay the artists, a model that triggered a fierce dispute between radio stations to form its professional and exclusive casts with popular stars of Brazilian music and also philharmonic orchestras. The most important samba singers, such as Carmen Miranda, started signing advantageous contracts to work exclusively with a certain radio station. The institution of auditorium programs created the need to set up big radio orchestras, conducted by arranging conductors, which gave a more sophisticated look to Brazilian popular music. One of the most notorious orchestral formations on the radio was the Orquestra Brasileira – under the command of conductor Radamés Gnatalli and with a team of musicians such as the sambistas João da Baiana, Bide and Heitor dos Prazeres in percussion -, which combined standards of the international song at that time with popular instruments in Brazilian music, such as the cavaquinho. The Orquestra Brasileira was notable for the success of the program Um milhão de melodias (One million melodies), by Rádio Nacional, one of the most popular in the history of Brazilian radio. In this golden age of radio broadcasting in Brazil, a new generation of composers from the middle class emerged, such as Ary Barroso, Ataulfo Alves, Braguinha, Lamartine Babo and Noel Rosa, who have built successful careers in this media. Grown up in the Vila Isabel middle-class neighborhood, Noel Rosa was instrumental in destigmatizing the samba do Estácio. Although he started his musical trajectory by composing Northeastern emboladas and similar Brazilian rural music genres, the composer changed his style by having contact with the samba made and sung by the sambistas from Estácio and others hills of Rio. This meeting resulted in friendships and partnerships between Noel and names as Ismael Silva and Cartola. Among singers, in addition to Noel