A 1932 Vargas decree regulating radio advertising was crucial to the commercial, professional and popular transformation of Brazilian broadcasting. With the authorization that ads could occupy 20% (and then 25%) of the programming, the radio became more attractive and safe for advertisers and – added to the increase in sales of radio sets in the period – transformed this telecommunication medium of its function once educational for an entertainment powerhouse. With the contribution of financial resources from advertising, the broadcasters began to invest in musical programming, turning the radio into the great popularizer of popular music in the Brazil – whether phonograph record or live recordings directly from the stations' auditoriums and studios. With samba as a great attraction, the radio gave space to the genre with the "sambas de carnaval", released for the carnival celebrations, and the "sambas de meio de ano" ("mid-year sambas"), launched throughout the year.
A 1932 Vargas decree regulating radio advertising was crucial to the commercial professional and popular transformation of Brazilian broadcasting With the authorization that ads could occupy 20% (and then 25%) of the programming the radio became more attractive and safe for advertisers and – added to the increase in sales of radio sets in the period – transformed this telecommunication medium of its function once educational for an entertainment powerhouse With the contribution of financial resources from advertising the broadcasters began to invest in musical programming turning the radio into the great popularizer of popular music in the Brazil – whether phonograph record or live recordings directly from the stations' auditoriums and studios With samba as a great attraction the radio gave space to the genre with the "sambas de carnaval" released for the carnival celebrations and the "sambas de meio de ano" ("mid-year sambas") launched throughout the year