[1] Mocchetti began playing the guitar with beat groups and formed the group Cristalli fragili, with Gianfranco D'Adda on drums and percussion and Richard Pirolli on vocals (the latter of whom would later have a solo career under the name Genco Pure & Co.) In the same period he began working as a session musician in the recording studio, playing on records by various artists.
In 1971 Cristalli fragili were discovered by Franco Battiato, and with the addition of other musicians, including keyboardist Roberto Cacciapaglia, the group became the Battiatio's support group in the studio and in live performances.
The following year he participated in the 29th edition of the Sanremo Music Festival with "Talismano nero".
In 1980 Mocchetti returned to the Cantagiro Festival with the song "Un amore in garage".
Affected by a serious family tragedy, Mocchetti was forced to take a break from his musical activities for a few years, but resumed in the new decade by signing with the Spintapes label and recording the 2004 album Beta, in which he reinterpreted every song (apart from "Revolution in the Air") in which he had participated on Battiato's records.