Theremin module for generating a variable control voltage by approaching/removing hand to/from an antenna. The distance range is about 30-40 cm. Additionally the module is equipped with a Gate output with adjustable threshold level. 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).

The CV output voltage of the A-178 can range - according to the setting of the front panel controls - from -10V...+10V. The gate output switches from 0V to about +10V.

Key Features:

• Eurorack control voltage generator using proximity sensing via antenna
• Hand movement controls CV output (approx. 30–40 cm operating range)
• Dual CV outputs with bipolar range up to approximately −10 V to +10 V
• Built-in gate output with adjustable threshold and gate LED indication
• Offset control for zero-point calibration of CV output
• Two LEDs for visual feedback of positive/negative CV and zero position
• Can control any CV parameter: pitch, filter, amplitude, modulation depth, timing
• Common use: expressive “theremin-style” performance or gestural modulation source
• Compatible with typical A-100 system modules (VCO, VCA, filter, envelope, sequencer)
• Compact Eurorack format: 8 HP width, ~40 mm depth, ~60 mA +12 V / 20 mA −12 V
  

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