Matt Orenstein is a Los Angeles-based composer, songwriter, and bassist. 

Matt got his start in the relentlessly experimental Minneapolis music scene as an adolescent in the early 2000's, the spirit of which he carried with him to Oberlin, OH. While at Oberlin Conservatory, he studied bass with Peter Dominguez (and Eddie Gomez during Dominguez's sabbatical), studied electronic music and composition, and played in as many different kinds of ensembles as he could. He spent 2011 to 2015 in Chicago, where he worked as a teacher, composer, songwriter, sound designer, and instrumentalist.

Matt's work and performances have seen ink in several publications, including: The New York Times, Pulse of the Twin Cities, the Allmusic Guide, and the Oberlin Review. He has worked with Four Larks, Laboratory Dancers (Chicago), Le Tour, Oberlin Dance Company, Fonema Consort, High Concept Laboratories, Death & Pretzels, Rediscover Theatre, and several other groups around the Minneapolis, Oberlin, Chicago, and Los Angeles areas.  He is also a three-time participant in the Chicago Home Theater Festival.

Matt has toured the country several times under several different banners, most recently with his ongoing project, Lionel O. So far, Lionel O has released six albums. 

In various capacities, Matt has opened for Marissa Nadler, Slick Rick, ONO, Thee Oh Sees, Bill Fox, LeRoy Bach (ex-Wilco), Sicbay, This Moment in Black History, Born Ruffians, and countless others.