They were joined by drummer Gilles Schetagne, percussionist Paul Picard and bassist Yves Leonard, to form the initial quintet.
Jerome's brother, Vincent Langlois, was added as a second keyboardist and a wind player, and an array of percussion instruments, some tuned, were used.
[4] In 1975, Billboard described the band as "pop avant-garde", writing that "they mix musique concrete in a style between early Zappa and Pink Floyd", and noted that the album "brought success beyond exepectations".
In the late 1990s, Live Montreal 1974-1975 was issued featuring recordings from the early version of the band, including the side-long "Le Rafiot" from their first album, as well as the unreleased "1-2-3-4-5-6".
In 2022, the original members reform the group and play a handful of shows, most notably at the Montreal International Jazz Festival on July 7, 2023.