Just thought I’d point out that pipe organs do a similar thing about controlling harmonics. But the corresponding control for each drawbar on the Hammond is ba

Just thought I’d point out that pipe organs do a similar thing about controlling harmonics. But the corresponding control for each drawbar on the Hammond is basically a binary switch instead of a quasi-continuous control. Further each individual pipe has its own harmonics and timbre while the Hammond tonewherls produce nearly (but not exactly) sinusoidal waveforms. Fancier pipe organs had multiple pipes at each harmonic. Eg, pipes that mimicked brass or woodwind instruments. This is why pipe organ consoles can be huge and cluttered with tons of switches. The Hammond simplified all that and let you adjust harmonics directly with a quasi-continuum via the drawbars. With the onset of jazz and rock in the 60’s, the Hammond’s unique sound became highly sought after. The so-called “Hammond Growl” through its tube amps, it’s own analog chorus and vibrato unit, the external rotating Leslie speaker’s effects, and even the “key click”. When the 70’s came along, pop tastes shifted to newer synthesisers and the last of the B3’s from the assembly line languished at organ dealers.