His prolific output between the 1960s and 1990s ranged across pop instrumentals, psychedelic rock and disco music, often incorporating elements of musique concrète, field recordings and samples in an eccentrically experimental and unique style.
[5] After several singles in the style of British and American instrumental groups such as the Shadows and the Ventures, Massiera and Malaussena formed a new band in 1964, under the name of Les Monégasques, with Fernand "Nicky" Cafiero (bass) and Jean Haumont (drums).
[6] Also in 1976, Massiera composed and produced one of his most notable albums, L'Etrange Mr. Whinster, credited to the act Horrific Child and marketed as a "psychological experience".
[9] The album incorporated African rhythms, samples, spoken excerpts from writers Baudelaire, Lovecraft and Lautréamont, and contributions from Massiera's regular contributors Torelli, Brent, and Jessy Joyce, among others.
[6] He also co-wrote and co-produced Jessy Joyce's album Love Me, and the single "Toi qui rève de baisers" credited to Sex Convention.
Massiera also produced folk rock albums by Valéry Btesh, and engineered releases by proto-punk band Little Bob Story.
Massiera's next album, Phantasmes, was credited to JPM & Co. and contains a mixture of styles including chanson, disco, experimental electronic music and prog rock, as well as the track "Dali court", a parody of Boney M's "Daddy Cool" dedicated to Salvador Dalí, and a version of Michel Legrand's "Les moulins de mon coeur".
The prog rock album featured many of Massiera's regular contributors including Bernard Torelli, Patrick Attali, Tony Bonfils, Jessy Joyce and André Ceccarelli.
[6][8] Before the end of the 1970s, Massiera also produced disco albums by Micky & Joyce (Hold Up) and Trans Am Dancing by Friends featuring singer Sparkle Tuhran.