I'm fond of a big, buzzy, complex drone sound, and I recently found two mulitanky videos that caused me to wonder about drone proliferation. The first is a demonstration of five drones played simultaneously, and the second video shows six:
http://www.youtube.com/watch?v=AA4-ZH5xMjQhttp://www.youtube.com/watch?v=27zeC4lJ8CIAre there drone configurations for which adding another unique drone hardly changes the sound of the set because the listener already hears that note due to difference tones, phantom fundamentals, or other psychoacoustic effects of the other drones? In other words, if I have a set with five drones, and it has no E drone, and I add a sixth drone that plays E, is it possible that the added drone will not change the sound because there is already an E difference tone or an E phantom fundamental produced by the 5-drone set? Can we expect that some drones on some six-drone sets are redundant because of this?