[2] Throughout his career, Seixas composed music in several genres, blending rock'n'roll, folk, and ballads with variations of Northeastern Brazil rhythms like forró, baião, and xote.

As a child living near the United States consulate, he became fluent in the English language, and was introduced to early rock and roll records of artists such as Little Richard, Jerry Lee Lewis and Elvis Presley through his contacts with American diplomats' children around 1956.

In the following year they released their first and only album on the Odeon label (later EMI-Odeon), which included a Portuguese language version of the Beatles' song "Lucy in the Sky with Diamonds" among many original numbers.

He wrote: "I spent all day locked in my room reading philosophy, with only a very feeble light, what ended up spoiling my eyesight [...] I bought a motorcycle and did crazy things in the street.

"[12] After his former bandmates moved back to Salvador, Seixas made a living as an English teacher before being hired by CBS, still in 1968, as creative director and record producer.

References to a wide range of historical and fictional personalities are found within his lyrics: The Beatles, Aleister Crowley, Al Capone, Marlon Brando, Jesus, Julius Caesar and Shakespeare, for example.

The influence extended not only to music, but also to plans for the creation of the "Sociedade Alternativa" (Alternative Society), which was to be an anarchist community in the state of Minas Gerais based on Crowley's premise: "'Do what thou wilt' shall be the whole of the Law."

[14][8] His final album, A Panela do Diabo, a partnership with fellow Bahian rocker Marcelo Nova (former leader of punk rock band Camisa de Vênus) was released two days before his death.