Long, long ago, a group of producers and engineers got together, somewhat Ad Hoc. But that grew into a formal organization under the auspices of NARAS, called the P&E WING, definitely not ad hoc. It’s a real known group within NARAS with officers and activities, one of which is to help define recommendations for formats of masters. But I haven’t seen any recommendations for listening rooms or monitors within the P&E, to the best of my knowledge.
