I can't tell you how many organists I've bumped into over the years who ask me this very same question, "do we add the numbers when adding a stop?", to which the answer is...NO. In order to create the desired effect, one must first understand how pipe organs work, and once that is done, then naturally, adding the numbers will seem 'not the right thing to do'. When you draw stops on a traditional organ, you're not necessarily making the ensemble louder.
I posted the list of stops and their drawbar equivalents for two reasons. First, it's nice to see how all the different stops can be produced using the drawbars, and also to help people out when it comes to adding a certain stop to the ensemble. While stops cannot be drawn on the Hammond organ one after the other to produce a 'combination' of registers, the effect of a combination can be achieved, but in a different manner. The largest number for each harmonic becomes the proper intensity in the final ensemble.
You may be wondering, "what do I do to create the effect of something like 'swell to great 16', or 'swell to great 4'?"
Super and sub couplers can be duplicated, but it's not easy.............
carlo
