Electronics Technician. I design and build custom loudspeaker systems, and do custom guitar modifications. I have worked in commercial audio with the biggest names in the business, including Eugene Stoner, the man who literally wrote the book on audio acoustics, and his son Richard. I have installed many, many house sound systems, though all the mixing consoles were analog back then. When the mixing consoles all converted to digital, I was doing instrument control systems in the oil field. I have somne experience on digotal mixers, but not a lot.