Voltage controlled filter
Voltage controlled oscillator
Digitally controlled oscillator
The VCF here is a pretty basic filter with envelope control and an LFO that can be modulated with keyboard input. The whole voltage controlled thing is just a hardware emulation.
Looks like a great simple synth. I hate synths like Massive that try to incorporate everything
(poorly). A basic synth that sounds good will do. We can make FX chains ourselves thank you.