https://makezine.com/article/craft/music/how-to-ondes-martenot-from-a-game-c/
Devin created a digital version of the classic ondes Martenot electronic instrument using a USB Gametrak controller - Like the Ondes, I wanted the
ondes martenotgame controllermake
https://makezine.com/article/craft/music/homebrew-ondes-martenot-music-synth/
Dana's excellent hamemade Ondes Martenot ring controller uses a multiturn potentiometer + pulleys making possible quite a lovely version of "When You Wish
ondes martenothomebrewmusicsynthcontroller