The Hammond Organ is an electric organ invented by Laurens Hammond in 1934 and manufactured by the Hammond Organ Company. Churches bought this organ as a cheaper alternative then a pipe organ. This mechanism uses additive synthesis of waveforms mad by harmonic series made by tone wheels that rotate in front of electromagnetic pickups. It was capable of producing any pipe organ combination of notes and overtones, at any dynamic level. There are two keyboards on the hammond organ, one is usually mounted higher then the other is.The component waveform ratios are mixed by sliding drawbars mounted above the two keyboards. The hammond B-3 Organ was the monist widely used and known, it gives off a sound used in a lot of Blues music, Blues-Rock, and progressive rock music. The Hammond was used for not only mood music but more significantly, for sound effects, For example, if you wanted a clock chime, you would set the drawbars at 010010603. The tone wheel inside the organ creates audio with low harmonic content, close to a sign wave, as the tone wheel has an "AC coil" inside of it which is a permanent magnate, when the tip of the teeth of the tone wheel pass by the magnet, that is when the magnet is strongest. The AC coil generates frequencies, the smaller/ finer the teeth on the tone wheel the higher the frequency. BELOW ARE SOME FAMOUS SONGS THAT THE HAMMOND ORGAN WAS USED IN. ENJOY

BELOW IS A HOW TO VIDEO ON HOW TO USE THE HAMMOND ORGAN: this video gets in depth on the foot pedals and every keys function, it also takes a look under the hood of the organ to take a look at the mechanics.