In the words of gajeanalog:
I've got this nice analog synth newly released by Korg. The synth itself is fun to play, but I want to add another oscillator to enrich the sound. This is my first experiment to add a VCO to Monotron. The 2nd oscillator output is sent to VCF as well as the first oscillator (i.e. the original). This can do soft sync also.
Developments for Korg's instrument have been slow but promising.