“A tannin is an astringent, bitter plant polyphenolic compound that binds to and precipitates proteins and various other organic compounds including amino acids and alkaloids.” (Wiki)
Behold the Tannin! An awesome Midi controller that is made from a grip of potentiometers, buttons, LED’s and an arduino! The project was released on Hackaday.io and the project can be found HERE. The Tannin midi controller demo can be viewed HERE.