Andy Ernst, aka Andro Ernst, is a producer, engineer, musician, songwriter, from San Francisco who's majority of work was at the Art Of Ears studio in Hayward. In the punk rock world, Andro was used as Andro Ernst's producer credit name, while Andy Ernst was usually used as his engineer name. And in the Hip Hop & Techno worlds, Andro or Andro Ernst was used. However at times, there are inconsistencies.