Weird models #1: Ever seen a Jankó keyboard in... | ThePiano.SG
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Gavin Koh
June 22, 2018 at 11:29am

Weird models #1: Ever seen a Jankó keyboard in action?
https://www.youtube.com/watch?v=cK4REjqGc9w

#PianoBrands #PianoModels

www.youtube.com
Demonstration of 4-Row Janko Keyboard
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