I helped out a local church a few years ago that had an electronic pipe organ from approximately 1980. It wasn't digital at all, it was purely analog. Some of

I helped out a local church a few years ago that had an electronic pipe organ from approximately 1980. It wasn't digital at all, it was purely analog. Some of the keys didn't work any more, and others were out of tune. Basically, the way it worked is that every key had a whole circuit (with two key circuits per pluggable card) behind it which generated the tones; it was ridiculously inefficient. Over time, a bunch of the capacitors had gone out of spec, beyond the ability to use the potentiometers to compensate.