Philippe and Hervé Lomprez, Trisomie 21 (often abbreviated to T21) are a French cold wave group who have endured since the early '80s, spanning styles such as brooding, experimental post-punk as well as a more danceable synth pop sound. The band formed in 1981, taking their name from trisomy 21, the medical term for the extra chromosome that causes Down syndrome. The two Lomprez brothers were initially joined by keyboard player Jean-Michel Matuszak (who also served as their manager) and bassist Pascal Tison, and their music was influenced by dark post-punk acts like Joy Division and the Cure as well as the experimentation of the Residents and Yello. Belgian label Stechak released T21's debut mini-album, Le Repos des Enfants Heureux, in 1983. Bassist Laurent Dagnicourt replaced Tison for the group's 1984 full-length Passions Divisées. Emphasizing the band's rhythm section while keeping their keyboard-heavy experimentation intact, the album included the haunting "La Fête Triste," which would emerge as one of their signature tunes.
T21 signed to Brussels-based industrial/goth label Play It Again Sam, greatly increasing their visibility. The 1985 EP Wait & Dance was issued by PIAS' short-lived Scarface imprint, followed by the 1986 full-length Chapter IV: Le Je-Ne-Sais-Quoi et le Presque Rien, which contained the group's biggest hit, "The Last Song." A re-recorded, remixed version of the album appeared in 1987, as did the full-length Million Lights, which appeared on PIAS proper following the Scarface sublabel's closure. The album was created solely by the Lomprez brothers, without a bass player, and was significantly more electronic than their past material. Arriving in 1988, Works marked the debut of guitarist Bruno Objoie, who also contributed to the more atmospheric Plays the Pictures (1989) and live album Raw Material (1990).
Distant Voices, which featured Tuxedomoon violinist Blaine Reininger and backing vocalist Lena Kane, found the group experimenting with jazz, pop, and cinematic textures, resulting in some of their strangest yet most accessible work. However, disputes with their label would delay their next album by several years. Following the release of three compilation CDs, 1987's ambient-influenced Gohohako would be T21's final album for PIAS.
Indochine. The comeback album Happy Mystery Child was released by Le Maquis in 2004, followed by a series of remix albums featuring producers from throughout the techno, electro, and EBM scenes. In 2007, the Belgian label Alfa Matrix released T21's live album Rendez-Vous en France, some copies of which included a CD of early rarities and demos. The group's final release on Le Maquis, 2009's Black Label, was one of their heavier, more driving releases.
Chapter I-IV, a vinyl box set containing expanded editions of T21's first four records, which were also reissued individually. The group also released a three-CD box set of early material titled Originally in 2018.