Vacuum tube modulator / waveshaper / distortion unit with twin inputs

Twins is an unique take on a operational amplifier - Created purely with four triodes, it can provide significant tube distortion to your waveforms. It contains no less than two vactrol-controlled channels (inverting and non-inverting) that can be connected in feedback. High distortion figure connected with a gain control will enable user to animate oscillator waveforms as well as any other sound source.
Sound demo: https://soundcloud.com/bardsynth/bard-twins-waveform-shaping
Some more details:
•Inputs are DC coupled, outputs are AC coupled internally and then buffered.
•Caution - requires 1200mA @ 5V for a couple seconds during start!
•Module uses two 6N3P (6Н3П) vacuum tubes.

https://bardsynthesizers.com/twins.html