The Engineers

At our purpose-built mastering boutique located in the Hollywood Hills of Los Angeles California,
we provide custom audio services with Steph’s trademark customer service and superlative sound
with which the Marsh Mastering name is synonymous.
Chief Mastering Engineer
Stephen Marsh​

"Stephen takes a different approach to mastering, he enhanced what was there with a lot of respect for the material. As a result, it's a piece of work that really stands up.”

Robert Carranza

Ozomatli & Los Lobos Engineer

Mastering Engineer
Justin Fleuriel

"OMG it sounds awesome


THANK YOU Justin!!"





Garrett Miller

Mastering Engineer
Fernando Lee

"I am SUPER STOKED on the sound! Absolutely love the sonics - quite possibly the best mastering job too date on my projects"





Kent Verderico

Alex Kerckhoff and Capital