Your charts look great! Ratbuddyssey sounds like another rabbit hole :). I'm still figuring out REW...I will give it a try this weekend.\n\n\nI posted some procedure for using it with Excel in my Editor App users thread if you are interested. It took me less than half an hour to get it within 3 dB peak to peak 20-120 Hz 1\/12 smoothing. To get it better than that took me a long time though.