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How do Hammond organs make sound?
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How does a tonewheel Hammond organ work?
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Multiple models have been produced, most of which use sliding drawbars to vary sounds. Until 1975, Hammond organs generated sound by creating an electric current from rotating a metal tonewheel near an electromagnetic pickup, and then strengthening the signal with an amplifier to drive a speaker cabinet.
Jun 29, 2022 · One to start it, and another “synchronous” motor that’s on all the time. The B3 is considered a “tonewheel organ” because of how it creates sound. The motor spins circular metal disks attached to magnetized rods, generating magnetic fields turned into audio signals by electromagnetic pickups.
The spinning treble horn and bass rotor gave the Hammond Organ a “tremulant”, as it’s called in the pipe organ world. Pitch-changing vibrato, volume-changing Tremolo, and a little “whoosh” of moving air all put together. It made the Hammond Organ sound completely different.
The drawbars actually emulate the pipes on a church organ, which is the job the Hammond was originally designed to do. They match up to the lengths of a church organ pipe and supposedly give the same sound — pulling out the lower drawbar produces a deep sound similar to the largest church organ pipe.
