From 1964 up to their eventual disbandment in 1980, he was part of Gruppo di Improvvisazione di Nuova Consonanza (G.I.N.C.), a group of composers who performed and recorded avant garde free improvisations. The Rome-based avant-garde ensemble was dedicated to the development of improvisation and new music methods. The ensemble functioned as a laboratory of sorts, working with anti-musical systems and noise techniques in an attempt to redefine the new music ensemble and explore "New Consonance."
Known as 'The Group' or 'Il Gruppo' for short, they released seven albums across the Deutsche Grammophon, RCA and Cramps labels: Gruppo di Improvvisazione Nuova Consonanza (1966), The Private Sea of Dreams (1967), Improvisationen (1968), The Feed-back (1970), Improvvisazioni a Formazioni Variate (1973), Nuova Consonanza (1975) and Musica su Schemi (1976). Perhaps the most famous of these is their album entitled The Feed-back, which combines free jazz and avant-garde classical music with funk; the album is frequently sampled by hip hop DJs and is considered to be one of the most collectable records in existence, often fetching over $1,000 at auction.
Morricone played a key role in The Group and was among the core members in its revolving line-up; in addition to serving as their trumpet player, he directed them on many occasions and they can be heard on a large number of his scores from the 1970s.
Held in high regard in avant-garde music circles, they are considered to be the first experimental composers collective, their only peers being the British improvisation collective AMM. Their influence can be heard in free improvising ensembles from the European movements including Evan Parker Electro-Acoustic Ensemble, the Swiss electronic free improvisation group Voice Crack, John Zorn and in the techniques of modern classical music and avant-garde jazz groups. The ensemble's groundbreaking work informed their work in composition. The ensemble did also perform in varying capacities with Morricone adding noise to some of his '60s and '70s Italian soundtracks, including A Quiet Place in the Country (1969) and Cold Eyes of Fear (1971)
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