A second basic waveform has been added, to be used as a sub-oscillator with some pulse width modulation for a fuller sound.

Main VCO tuned to middle C (C4 261.63Hz)
sub-oscillator VCO tuned to fifth G4 (392Hz), fourth F4 (349.22Hz), third E4 (329.63Hz) or 2 octaves down slightly detuned C2 (65.5Hz)