The Ondioline

The Ondioline is an electronic keyboard instrument, invented in 1941[1] by the Frenchman Georges Jenny, and is a forerunner of today’s synthesizers. Jean-Jacques Perrey continued to perform live shows with the Ondioline until his death in 2016; he featured the instrument on his Oglio Records albums with musician Dana Countryman, The Happy Electropop Music Machine (2006) and Destination Space (2008). [4] In a 2018 interview with Australia’s Broadsheet, Gotye said, “You can dial in an incredibly wide range of sounds on the ondioline, and the unique mechanics for playing it allows you to create sounds very sensitively and with a musical deftness I just feel isn’t present on most other electronic instruments from the ’40s – or decades since.”

Source: en.wikipedia.org