top of page

T i m o t h y   J .  S t o l l e n w e r k  

timothy stollenwerk.jpg



Hello. My name is Timothy Stollenwerk, owner and operator of Stereophonic Mastering in Portland, Oregon.


Over the years I've had the honor to master more than 2,000 titles (including a Grammy nominated album) for a wide variety of musicians, artists and musical styles both locally and around the world. I feel endless gratitude to all of those who have entrusted me with their art.

In 1991 I started my career as a sound engineer, and have worked independently as a full-time mastering engineer since 2003.   I don't mix records and I don't record records.  Instead I've focused solely on mastering and have more than ten thousand hours under my belt as a mastering engineer. 

My goal in mastering is to help capture and engage the listener so that they want to listen again and again, hearing something new each time, no matter what system their music is played on.

I discovered audio engineering during high school. My brother and I started by recording boombox into boombox as a way to multi-track our band's music. Later a good friend loaned me his Fostex four-track recorder, which blew my mind and gave me my first real taste of what's possible.  

After graduating in 1991 I decided to skip college and took out a small loan and bought a Sony DAT machine, microphones, Tascam 424 multi-track recorder, and began offering mobile recording services to local bands in Waukesha, WI.   This modest start lit the spark of my current path and life long journey.   

My shift from recording / mixing to mastering began after moving to Portland in 1998. That was at the same time I got my first computer and was then able to work with digital audio.

Stereophonic Mastering was born in 2002 in the dining room of a shared house, and for the next decade I went on to master more than a thousand titles there.  In 2013 I purchased a house in North Portland, and built a studio on site where I'm currently doing my best work to date while running some of the finest in analog and digital technology available today.


-Timothy Stollenwerk 2021


bottom of page