512 DUAL VCOs are represented with two independent voltage controlled oscillators (VCOs) combined in one module.
Each oscillator has its own input for the keyboard and two for modulation signals. The inputs are designed for 1V/oct signal. You can switch the sound range, and there is also a micro-tuning possibility. The voices can be synchronized with each other or with an external signal through the SYNC IN/OUT jacks with the option of "weak" or "strong" mode. Pulse width modulation (PWM) by the built-in oscillator or by an external source is available. All three signals of different waveforms have independent outputs.
The module is designed, like the entire System-500, in a strict vintage style.