This group of Catalan youth led by the Batiste-Herrera duo soon became the most prominent and visible heads of the grassroots movement which shook the foundations of the city's musical world at the beginning of the seventies, and which can be considered as the parting shot for progressive rock in Spain.

The album is characterized by the use of effects widely popular at the time, such as wah-wah, fuzz, and Hammond organ.

Jordi Batiste had to leave the band before finishing the album to join the army in compulsory military service, which in those years lasted around 15 months.

Being reduced to two members, París decided to give up the band and return to Sweden as well, where he used to live before joining Maquina!

The Herrera's new line-up included three teenagers from the band Crac, then abandoning a contract for their own project's debut album.

They added the new influences of jazz-rock, blues, soul and funk to their style and the four-piece band became an eight-piece with brass players.

Their second and final LP, En directo, was recorded as a live concert in July 1972 with the collaboration of founder member Jordi Batiste on vocals.