This 10HP Eurorack module has all the features a basic VCO needs. The module is based on the famous CEM3340/AS3340 chip. It outputs multiple waveforms, namely, square waves, triangle waves and sawtooth waves. The frequencies of all these waveforms can be voltage controlled using either the V/oct input or the vanilla frequency CV input. Next to that it has more advanced features like hard and soft sync, and also includes a knob and CV input for pulse width modulation. All in all, a great VCO to add to your Eurorack modular synthesizer.