http://www.gsmusic.com.ar/preorder.html
"GS Apollo I is an analog monophonic synthesizer featuring subtractive synthesis. The sound generation is entirely analog. It has two voltage controlled oscillators (VCO), a mixer, a voltage controlled filter and a voltage controlled amplifier (VCA). The control signals are digitally generated by a microcontroller, which is capable of processing three low frequency oscillators (LFO) and two ADSR envelopes (EG)."
