Gebre Waddell is a noted mastering engineer and owner of Stonebridge Mastering. His 10-year career includes work with artists such as Public Enemy, Ministry, George Clinton, and Rick Ross. Waddell is a current member of the Grammy Recording Academy and the Audio Engineering Society. He has created many resources, including The Digital Publishing Standard for Audio Recordings and a popular spectrographic frequency chart titled "The Frequency Domain." Most recently, Waddell has been working with DSP algorithm design and VST programming.