Invisible was originally formed by Luis Alberto Spinetta (guitars and vocals) who was formerly from the band Pescado Rabioso* that recently broke up at the time. The bass and drums were played by two former Pappo's Blues members Hector Lorenzo (drums) and Carlos Rufino (bass.) During the beginning of the bands playing (1973) the music was more straightforward rock with influences of Hendrix and Zeppelin and touches of a Black Sabbath sound. Their first, self-titled album, reflected their influences and was very complex, especially for a three man rock group.

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