Herren releases music under the aliases Prefuse 73, Delarosa & Asora, Ahmad Szabo, and Piano Overlord, and is also part of the groups Savath y Savalas, Sons of the Morning, Fudge, Risil, and Diamond Watch Wrists.

He eventually moved to New York City to go to college; there he began recording his first major release, Sleep Method Suite, under the name of Delarosa and Asora.

The album is sold with a bonus full-length disc titled Interregnums, featuring songs that were more ambient and contemplative than usual Prefuse 73 material.

[4] Along with partners Peter Rentz, Carolina Chaves, Ben Loiz, Carlos Niño, and Paz Ochs, Herren started the Eastern Developments Music label.

[citation needed] In June 2008, Herren announced the formation of a new collaborative project, Risil, which includes members of Sunn O))), Hella, School of Seven Bells, Pivot, and others.