Acoustisoft (aka Doug Plumb), makers of ETF, have released R+D (Resonance & Distortion) 1.0. It’s similar to ETF, but designed to do averaging of multiple curves for working with room problems. It also does DSP/EQ modeling of the Behringer DSP1124 Feedback Destroyer (BFD) in a way that is supposed to be much more accurate that typical EQ result modeling. The advanced version also has features to automatically pick EQ points for a give measurement or average of measurements. Here is an AVS thread on R+D
I have gone through Doug’s videos and started poking around with the application. I will post more when I have a chance to try it and compare to ETF. Doug says it will eventually have all of the capability of ETF and could be considered ETF v6.
It’s an interesting deveopment of the product geared toward addressing room issues via EQ, which is a popular topic at the moment. Given the low cost of a the BFD ($100) and the relatively low cost of the software compared to some options, it seems like a useful tool for many people.
Of course, Room EQ Wizard is still free and overlaps in function, but lacks the important averaging of multiple measurements. Unless you listen alone in one place, this is very important.
Since the BFD isn’t designed with home entertainment use in mind, it does lack some function of its more expensive counterparts (Onix R-DES $400 and Velodyne SMS-1 was $500 now $700), particularly their ability to store mulitple EQ curves and easily switch between them. On the other hand, the BFD is designed for full-range EQ and could be used on main speakers as well as subwoofers.
