In the beginning of the 80’s, J.A. was already producing soundtracks. His top works at that time were the songs he composed for the Christmas Chronicles of Brazilian writer Lourenço Diaféria and the soundtrack composed to the radio soap opera "Inocência" ( Innocence ).
In 84 he joined in the an acoustic 12 - stringed guitar duo called "Claves e Cordas" ( Clefs and Strings ), where he remained until 89. From that period came his first CD and several remarkable gigs.