Eric Valentine

Owner and chief visionary, Eric Valentine's constant experimentation and exacting standards  are what has molded Barefoot into the studio it is today.

From his very first Tascam 244 Portastudio to the Neve 88R, Eric has had his hands on just about every piece of equipment designed for the purpose of recording sound.  He brings the perspective and vision of an end user – that is still actively making records every day – to the design process. Striving to fulfill needs and solve the problems of today’s record makers, Eric created Barefoot and Undertone Audio as outlets for these ideas to be available to musicians, engineers, and producers.

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Tim O’Sullivan

Chief Engineer and Studio Manager Tim O’Sullivan has been around Barefoot since 2012 when he worked at UTA wiring consoles.  After a stint in Brooklyn, Tim has returned to Barefoot as Studio Manager and Engineer.

Tim has worked with Karen O, The YYY’s, Nick Zinner, N.A.S.A., Anderson Paak, Grace Potter, Doyle Bramhall II, Lizzo, and Money Mark.


Justin Long

Justin Long is a producer/engineer/songwriter who has been at Barefoot since 2013. He’s worked on projects alongside Eric for Nickel Creek, Keith Urban, 5 Seconds of Summer, and Grace Potter, as well as engineered various other artists such as Sleater-Kinney, The Wombats, and Fitz and the Tantrums.

photo by Jason Lowrie

photo by Jason Lowrie

David Martinez

David Martinez began his recording career in 2002 during his time at Cal Poly Pomona. After several years of serving in the U.S. Army, he has worked at various recording studios in the LA area. David has been fortunate enough to have worked with artists such as Melissa Etheridge, Steve Jordan, Willy Weeks, LeAnn Rimes, Carole King, and many others. David is a student of Niko Bolas and the late Gary Denton and continues to put what he has learned to good use at Barefoot.


Randy Belculfine

Randy Belculfine is a recording / mix engineer from Boston, MA, and a graduate of Berklee College of Music. He began his journey in music as a guitarist and went on to study audio under world-class engineers such as Susan Rogers, Jonathan Wyner, Mark Wessel, and Leanne Ungar.

Specializing in hip-hop and R&B, Randy has worked with such names as Alex Da Kid, Leon Thomas, Tones And I, T-Pain, Bobby Raps, Tanerélle, and Pink Sweats.


Jacob Johnston

Jacob Johnston is a newer addition to Barefoot Recording. After going to CRAS and moving to Los Angeles from Arizona in July of 2018, Jacob has worked along side the engineers and producers at Barefoot on recordings with Sleater Kinney and St. Vincent, Grace Potter, HOLYCHILD, Andrew Bird, Madison Cunningham, The Head And The Heart, Money Mark, Chicano Batman, and Leonard Cohen among many others.