A-178 Theremin Control Voltage Source

Theremin module for generating a variable control voltage by approaching/removing hand to/from an antenna. Additionally the module is equipped with a Gate output with adjustable threshold level. Probably the module will also be available in a version with a separate case so that the antenna can be placed outside the A-100. Controls/Inputs/Outputs: antenna input, offset (knob for zero adjust), 2 x CV out, 2 x LED (for CV control positive/negative and zero offset adjust)
To simulate the original Theremin two A-178, a VCO (e.g. A-110) and a linear VCA (e.g. A-130 or A-132) are required. But of course the A-178 can be used to control other functions in the A-100 (e.g. filter frequency, modulation depth and/or speed, tempo, attack/decay time and so on).
A similiar module using the illumination intensity instead of the distance between hand and antenna is the Light-to-CV Converter A-179.

For more detailed information please look at the English user's guide alternatively as html file (for browser view) or as pdf file (for printout).

Applications:

• controlling any voltage controlled parameter of the A-100, e.g. pitch or pulswidth (VCO A-110), loudness (VCA A-130/131/132), panorama (A-134), filter frequency or resonance (A-120/121/122/123), phasing (A-125), frequency shift (A-126), resonance peaks (A-127), envelope parameters (A-141/142), tempo (A-147), passive control by covering/shading the sensor via hand or body, active control by using pocket lamp/flashlight/laser.
• triggering of A-100 activities via gate with adjustable threshold, e.g. starting an envelope (A-140/141/142), Start/Stop of a sequence (A-155), any switching function (A-150/151)
• Conversion into MIDI control change messages is possible with the  A-192.