I’d like to spend a few posts exploring the reasons the Reformation liked the organ so much. Their reasons are usually not ours. They did not endorse the organ because it was an old or traditional instrument; it was actually because it was so new. It was equipped with new technologies that could produce new possibilities for sound. They did not like it because it was huge and grand; oftentimes, the organs of this period were small enough to be fit in houses. They did not like it because it had religious connotations; the late Middle Ages and the Reformation invented the religious connotations for the organ, which had had a largely secular one in previous eras.
First example is Elias Nicolaus Ammerbach, organist at Leipzig in St. Thomas Church. He published a pedagogical anthology of organ music, sacred and secular, for organ and said this in his introduction:
“Among different musical instruments, however, of which I leave each as established in its worth, the organ—so nowadays employed in our churches and sacred service, and (as some suppose) unknown to the ancients—, in my opinion, justly has preference. For on it, thanks to its abundant stops (Regiester) and many kinds of timbres (stimwercks), one can devise and realize a great varietet and artistic change in the voices, which is not found on other instruments.” (lxxiv, “Source Texts”, Orgel Oder Instrument Tabulaturbuch, Elias Nicolaus Ammerbach)