VCO and VCA are the terms from synthesizer technology and stand for Voltage Controlled Oscillator and Voltage Controlled Amplifier, two of the most important devices in generating the synthesizer's signal.
The rest of the song also has some references to synthesizer technology, such as "patch bay", "EQ low cut" and "Frequency 1000".
Sadly, the general idea of the song keeps eluding generation of fans, and probably only vangelis could explain what he meant by it, though there's still not enough certainty about it.
In case, you're wondering.
VCO and VCA are the terms from synthesizer technology and stand for Voltage Controlled Oscillator and Voltage Controlled Amplifier, two of the most important devices in generating the synthesizer's signal.
The rest of the song also has some references to synthesizer technology, such as "patch bay", "EQ low cut" and "Frequency 1000".
Sadly, the general idea of the song keeps eluding generation of fans, and probably only vangelis could explain what he meant by it, though there's still not enough certainty about it.