Ginette DIY instrument based on the ondes Martenot

I designed and built this instrument during 20102011. The idea is based on the ondes Martenot that was invented by Maurice Martenot in 1928. My instrument is named Ginette after Ginette Martenot an ondist and the sister of Maurice Martenot. She played ondes Martenot at the premiere of Olivier Messiaen s TurangalîlaSymphonie. The heart of the instrument is a voltagecontrolled oscillator (VCO) that produces the sound. I found great VCO design from Music From Outer Space website. The VCO produc