In 1976, the Brazilian band Novos Baianos transformed the Carnival experience by innovating the sound system of the electric trio, originally intended for instrumental performances. Osmar, one of the inventors, initially used the trio's microphone merely for speaking to the audience, which led to an early instance of technical mishaps like feedback. However, during that year's Carnival, the band found a solution that allowed lead singers such as Moraes Moreira and Baby do Brasil to perform effectively. Their approach integrated a specific vocal sound that enhanced the overall experience for both performers and revelers.

Novos Baianos blended their artistry with Carnival, making their performances not just about music, but about creating a celebratory atmosphere on the streets. Their recognition of the need for clarity in vocal performances directly addressed the previous shortcomings of the electric trio, marking a significant evolution in how live music was presented during the festivities. This adaptation not only benefited the band but also had lasting implications for future Carnival artists, setting new standards for sound quality during these lively events.

As a result of this innovation, the electric trio became synonymous with vibrant street performance in Brazil, paving the way for a new genre of live music that is now a staple of Carnival celebrations. The changes brought by Novos Baianos demonstrated how music and technical advancements could intertwine, creating a memorable experience for both artists and fans, and solidifying their legacy in Brazilian cultural history.