The VCO has individual outputs for sawtooth, pulse and triangle. While saw and pulse have a very rich sound full of harmonics, the latter produces a tremendous sub-bass.
Oscillator frequency is set coarse with the "range" pot and fine with the "pitch" control. There's a 1V/octave input and a nexponential CV input with attenuator.
The pulse width is set with the "manual" control and via CV. Compared to other VCO it sounds more dicreet as it ranges from 50/50 to 90/10 and not over the whole width range until sound cancellation. Super-wide modulations or ultra-narrow spikes are not possible but the VCO sounds awesome with the PWM at 50/50 (fully counterclockwise).
The System X VCO features oscillator synchrinosation which can be switched from soft sync (weak) and hard sync (strong). No matter what your choice is, the syncs both sound unbelievably good and cutting. Definiely different from a brassy Oberheim SEM sync.
Picture shows the old, fatter panel graphics. The new one is thinner but otherwise the same.
1x PWM CV input; 1x 1V/octave input and 1x frequency CV input
Waveform outputs: sawtooth, pulse, triangle
3U Eurorack module, 10HP wide, 60mm deep
Current draw: 10mA @ +12V and 10mA @ -12V