O’Sullivan Audio Opens New Studio in Frogtown LA
Pictured at O’Sullivan Audio are (L-R) Tim O’Sullivan and Beastie Boy Money Mark with Eastwood La Baye 2x4 Devo signature guitar. Photos by David Goggin.
Los Angeles, CA, August 2025 – Five-time Grammy-nominated engineer/producer and studio integrator Tim O’Sullivan has opened his new studio in the Frogtown area of Los Angeles alongside the LA River. Formerly the home of Beastie Boy Money Mark, O’Sullivan’s renovated space features large, vaulted ceilings, a motorized Drumbrella, and iso booth adjacent to his spacious control room.
“I love these rooms where I recorded some of my favorite tracks,” says Money Mark. “Tim is like a mad scientist who can create new signal paths, unusual gear combos, and record nicedistinctive sounds.”
Money Mark and Tim O’Sullivan with Moog Voyager in the tracking room. Above right is the Drumbrella for modifying percussion instrument recordings.
O’Sullivan Audio houses a collection of music making tools carefully curated over a career making records and building studios, including a 32-channel SoundCraft Ghost console, UTA mic-pre’s and EQ’s, Aviom cue mixing system, and prized synths and keyboards. O’Sullivan’s collection also includes a full toolbox of mics, effects pedals, drums, and over 30 quality guitars and basses.
O’Sullivan’s keyboard collection includes Hammond M3, Fender Rhodes, Juno 6, Moog Voyager, and others.
Famed producer/engineer and METalliance member Niko Bolas, who worked at Capitol Studios with O’Sullivan as his second engineer and tech support, commented, “Tim is an all-around studio rat like me and proved himself many times under fire. He knows how to operate everything in a studio and how to engineer really great music.”
Following Capitol, O’Sullivan was the first full time employee at Undertone Audio, working out of Eric Valentine’s Barefoot Recording Studio (formerly the legendary Crystal Sound studios) and was integral in getting Undertone Audio off the ground.
In 2018, O’Sullivan (on Valentine’s behalf) reopened Barefoot Recording Studio as a fullycommercial studio (after 18 years as Eric’s private studio). Acting as Studio Manager and Chief Engineer, he also took up residence in Studio B, continuing to work as an independentproducer/engineer and mixer.
O’Sullivan continues to outfit and integrate studios and operate as a much sought after studio technician. Clients include Greg Wells, Pete Min/Lucy's Meatmarket, Chris Lord-Alge, Robby Krieger, Drew Erickson, Nick Zinner, Cian Riordan, Dylan “3D” Dresdow, Micheal Andrews/Elgin Park Recording, and Chris Fogel, among others.
O’Sullivan tech shop with assortment of vintage and custom guitars.
Popular recording artists O’Sullivan has worked with include: Rayland Baxter, Grace Potter, Leonard Cohen, The Head and The Heart, Money Mark, Nick Zinner, Chicano Batman, KarenO, Mia Doi Todd, Andrew Wyatt, É Arenas, Yeah Yeah Yeahs.
O’Sullivan comments, “After years of building studios and collaborating with talented artists, producers and engineers, it’s incredibly rewarding to have a space built to my specs and where myself and other engineers and producers can apply all I’ve learned to help artists capture the sounds they imagine.”
Below are samples of Tim has either produced, mixed, or engineered.