a.pe.ri.od.ic is a Chicago-based concert series and performance collective curated by Nomi Epstein featuring post-Cagean notated, experimental music. Repertoire explores the indeterminacy of various musical elements including instrumentation, structure, pitch, and/or duration.

Eliza Bangert, flute
Nora Barton, cello
Nomi Epstein, piano/founder
Billie Howard, piano/violin
Jeff Kimmel, clarinet
Kenn Kumpf, voice
Matthew Oliphant, french horn
Robert Reinhart, voice/bassoon