Inside Therevox Custom Musical Instruments

Reader Stephen Young created this short film, Therevox – Wood & Wires, which takes a look inside the workshop of Therevox Custom Musical Instruments.

Since 2004, Mike Beauchamp’s Therevox has made instruments in the tradition of Paul Tanner’s Electro-Theremin and the Ondes Martenot.

Their ET-4 line is controlled by moving a finger along a reference keyboard, shaped to provide tactile feedback. Dual pressure sensitive intensity keys control the amplitude of the ET-4’s two independent analog oscillators. The ET-4’s performance options are rounded out by a low-pass filter, white noise generator and internal spring reverb.

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Therevox ET-4.3 Synthesizer Inspired By Ondes Martenot, Electro-Theremin

Here’s a quick demo of the Therevox ET-4.3 continuous pitch analog instrument.

This includes a 4-mode MIDI over USB output, controlling two instances of AMsynth, an assignable expression pedal/CV input and intensity key “hold” knobs. Continue reading

Gakken SX-150 Mod Turns It Into A Cheap Electro-Theremin

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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.