The poly Laboratory VCO does everything the mono version does and more. (Please read that description.) All modulation inputs have poly and mono jacks that can be used individually or together, meaning that this VCO exists in both worlds at the same time. Waveform outputs are poly, with poly and mono mixes provided. No need for conversion modules no matter which way you’re going. The SPREAD switch changes the FINE knob from a tuner to a spreader, so when you listen to a mono mix output you’ll hear super fat unison. Where this really becomes amazing is when you use this module as a poly LFO. Spreading the frequencies yields the lushest, asynchronous FM chorusing you have ever heard.