Giuseppe Di Cillo hacked his Gakken SX-150 to add a pressure sensitive ribbon controller, turning it into a cheap electro-theremin.
The Mod Ingredients:
- 1 50cm softpot sensor
- 2 15kh resistors
- 1 wooden board
- 2 female audio jacks
- A cable with two stereo male audio jack
- 1 3-terminal connector for printed circuit
- electric cables
Details on the Gakken SX-150 mod are available at Coagula.