The ‘Hardy-Goldthwaite Organ’ Hardy & Goldthwaite, USA, 1930

The Hardy-Goldthwaite organ was a type of early  analogue sampler, similar to the Welte Licht-Ton Orgel,  using optical discs of photographed sound waves. The discs, created from translations of original instrumental sounds, rotate between a light a slit and a photo-electrical cell generating outputs of various timbres.


Sources:

A History of Sampling (Hugh Davies)

Electronic and Experimental Music: Technology, Music, and Culture. Thom Holmes

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