Telharmonium
Type of electrical organ / From Wikipedia, the free encyclopedia
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The Telharmonium (also known as the Dynamophone[1]) was an early electrical organ, developed by Thaddeus Cahill c. 1896 and patented in 1897.[2][3][4] The electrical signal from the Telharmonium was transmitted over wires; it was heard on the receiving end by means of "horn" speakers.[5]
Like the later Hammond organ, the Telharmonium used tonewheels to generate musical sounds as electrical signals by additive synthesis.[5] It is considered to be the first electromechanical musical instrument.