[4] He received a doctorate in multimedia composition at the Hochschule für Musik und Theater Hamburg, studying under Georg Hajdu and Manfred Stahnke.
[8] A founding member of ensembles Decoder, Trnn, Schubert-Kettlitz-Schwerdt, and Ember, he has also pursued an experimental pop music solo project under the name Sinebag.
[9] Schubert's pieces have been performed at several international institutions, including Wien Modern,[10][11][12] ICMC,[13] SMC,[14] Ultima Oslo Contemporary Music Festival,[15] DLF Forum neuer Musik,[16][17] IRCAM,[18][19][20] ZKM Center for Art and Media Karlsruhe, Huddersfield Contemporary Music Festival,[21][22] and Blurred Edges in Hamburg.
[27][28] Praised by some commentators for its fusion of avant-garde and pop styles,[29][30] immersive qualities,[31][32] and distinctive engagement with the internet,[33][34] Schubert's critics have found his work excessively confrontational[35] or conceptual.
[37] In 2009, Schubert won the Bourges Residency Prize, and his piece Nachtschatten (Nightshade) placed in the Canadian Electroacoustic Community "Jeu de temps" competition.