About SisterBoss

SisterBoss is a full service sound arts studio in the heart of downtown Minneapolis on the top floor of the historic Lumber Exchange building. It was concepted and built as a stand-alone audio facility - one of the only studios in the twin cities to focus exclusively on sound design, mix, and voice recording.


We specialize in mixing and sound design for both visual and audio-only projects, utilizing artful techniques to bring stories to life while working closely with creatives to fulfill their vision. Our clients are ad agencies, production companies, editorial houses, and corporate clients. We also partner with independent filmmakers on special projects.


We excel at working with challenged audio recordings and cleanup, helping to direct and inspire great voice over performances, and have a comprehensive understanding of all of the different audio masters that can be needed when shipping to various broadcast/social/streaming platforms.


Carl White and Annie Sparrows helmed former sound and music company BWN Music along with Ken Brahmstedt. From 2006 through 2015 BWN grew to necessitate a split into two separate entities: Music (Black Label Music) and Sound (SisterBoss). After years of setting the standard as an industry legend, Annie Sparrows has passed the torch to Jaimie Johnson. With nearly two decades of experience in voiceover, production, and audio engineering, Jaimie joins Carl as co-owner.

Joining Jaimie and Carl as co-owners are Micah Johnson (your friendly, neighborhood SisterBoss mixer), and Nora Wildgen (our new Art Director). Together, we'll continue to deliver exceptional service and expertise to our clients, using our artful techniques to bring their stories to life.

  • Carl White

    The progeny of a "professional chemist" + another chemist who would sneeze every morning operatically, spoke in German, and sang too loudly, Carl found himself growing up in a noisy but amicable household in West Virginia.

  • Jaimie Johnson

    Meet Jaimie, a self-proclaimed geek and lover of all things music, games, and technology. Growing up, she spent her days belting out tunes into the floor stick shift of her parent's VW van, thanks to her musician father who also happens to make killer hand-crafted ribbon microphones.

  • Micah Johnson

    The stones for Micah’s audio path were set early when he would run sound for his father’s church in Florida where he grew up. His love of sound grew through his teenage years as he became engrossed in car audio and participated in statewide bass contests…

  • Jeff Marcovis

    Originally hailing from Des Moines, IA, Jeff was drawn to music and sound from a young age. He’d construct instruments from whatever he could find, whether it was tennis rackets for guitars, or pots and pans as drums. Jeff moved to Minneapolis for college…

  • Jill Asp

    Minnesotan born and raised, Jill has always been what some might call a good ol’ fashioned dreamer. From the get-go, she was quite certain she would follow in the footsteps of her childhood idol, ONJ (that’s Olivia Newton-John for the not-so-savvy).

  • Nora Wildgen

    Nora is leading a thoroughly artful life rooted in Minneapolis with family, chickens, and native gardening. She draws, she paints, she plants. She makes good soup.

  • Sai Whitlatch

    Sai was born in small-town Iowa, but never stayed put for too long. At ten years old, they were introduced to two artists that shaped their future: Bob Dylan and Aphex Twin. Sai was captivated by the mystery and intrigue woven throughout each artists’ discography.

  • Victor

    At the Lumber Exchange Building, Victor is not just the security guard; he's the official greeter of positivity and the purveyor of smiles! When you enter our doors, it's Victor's friendly face that welcomes you.