The Therevox ET-4.1 is an analog continuous pitch instrument inspired by the interface of the rare Ondes Martenot.
Each oscillator has six different waveforms, including the classic sine wave of the Electro-Theremin and the Ondes Martenot’s unique octiviant and white noise settings. Each oscillator can be tuned separately, or synched to create intervals or interesting harmonics. Oscillator 2 can also be set to a consistent note or used as an LFO to modulate the filter. The internal low-pass filter with variable cutoff frequency is used to shape the sound and this can also be controlled with an external expression pedal or CV source.
Here’s a video intro to the Therevox ET-4.1:
Details and Specifications
- Two independent temperature compensated analog oscillators with sync function
- Six octave positions for each oscillator covering C0 to C8
- Six waveforms (sine, triangle, rectified sine/octiviant, 50% pulse, 30% pulse, 10% pulse (white noise on Osc 2)
- Adjustable ring with metal reinforced wire
- Replaceable reference keyboard with alternatives available (ex: lapsteel, specific scales, microtonal)
- Dual wooden pressure-sensitive intensity keys with approx. 3/4″ travel
- Low-pass filter with adjustable cutoff frequency (can be controlled by expression pedal or external CV)
- Internal spring reverb with dry+wet mix control
- “Silent” tuner output, switchable between oscillators
- Line-level (+3db) output with volume control
- Control Voltage (CV) outputs for ring position (1V/octave) and both intensity keys (0 – 10V)
- 16VAC power input
- Dimensions: 30 x 11 x 4″
- Includes: Printed manual, power supply (110-120V and 220-240V Available) and extension cable.
- Made in Canada
The Therevox ET-4.1 is priced at US $1475. See the Therevox site for details.