Casa das Máquinas was one of the most important '70s rock bands in Brazil. The group was formed by some former-members of Os Incríveis and sounded less commercial and more modern than the older band.On their first record, “Casa das Máquinas”, the band followed the standards of the genre we know as hard rock. On the following one, “Lar de Maravilhas”, they adopted a softer style and that work was considered to be one of the best records of the sort in the country. On their third and last studio recording, “Casa de Rock”, the musicians re-adopted their original style, priorizing basic rock. In 1978, the live album Ao Vivo: Abril 1978 Santos was released and that became the last official recording of the group.