Gérard Depardieu | Gerard Butler | Gerard Manley Hopkins | Gerard K. O'Neill | Gérard Philipe | Gerard Malanga | Gérard Caussé | Jean-Claude Gérard | Gérard Souzay | Gérard de Nerval | Gus Gerard | Gerard Schwarz | Gérard Jugnot | Gerard Henderson | Gerard Byrne | Gerard Neesham | Gerard McManus | Gerard McCarthy | Gerard Leachman | Gérard Lauzier | Gerard Kuiper | Gerard Hoffnung | Adam Gerard Mappa | Gerard Way | Gerard van Honthorst | Gérard Prunier | Gérard Presgurvic | Gerard of Florennes | Gérard Leman | Gerard Langbaine |
In 1995–6 he was a pupil of Gérard Grisey and Emmanuel Nunes at the Conservatoire de Paris (CNSMDP), after which he completed his training with Hartmut Fladt and Jörg Mainka (theory) and with Friedrich Goldmann, Gösta Neuwirth, and Hanspeter Kyburz at the Universität der Künste Berlin.
Among the composers who wrote music for the ensemble are Pierre Boulez, Brian Ferneyhough, Vinko Globokar, Gérard Grisey, Heinz Holliger, Mauricio Kagel, Helmut Lachenmann, György Ligeti, Krzysztof Penderecki, Steve Reich, Dieter Schnebel, and Hans Zender.
Halbreich's interest in modern music has led to articles on composers including contemporary music, particularly Spectral music: Horațiu Rădulescu, Iancu Dumitrescu, Ana-Maria Avram, Gérard Grisey and Tristan Murail.
Wide his studies in courses of composition and orchestral conducting with Franco Donatoni, Carmelo Bernaola, Cristobal Halffter, Gerard Grisey and Enrique García Asensio.
In the United States and abroad, he has premiered and recorded works of many contemporary composers, including Charles Wuorinen, Milton Babbitt, Elliott Carter, Lasse Thoresen, Gerard Grisey, Jonathan Dawe, Tristan Murail, Ralph Shapey, Luigi Nono, Mario Davidovsky, and Wolfgang Rihm.
Partiels (1975) is a defining piece of Spectral music by Gérard Grisey whose opening is derived from an electronic sonogram analysis of the attack of a low E2 on a trombone.