Analogue Solutions Polymath - Manual (Page 17)

Polymath
Analogue Solutions | Circuits – Main PANEL 17
This is the audio output from the Voice Gate circuit, that is controlled by the MIDI converter.
The actual waveform is determined with the Wave select switch.
SUB1 Out (VCO1 only)
This is the audio output from the Sub oscillator. This follows the pitch of the main oscillator
but at -1 octave.
SUB2 Out (VCO1 only)
This is the audio output from the Sub oscillator. This follows the pitch of the main oscillator
but at -2 octave.
Normally a sub-osc is used to beef up the sound, particularly good on bass sounds.
Just patch one of the Sub outputs (Sub1 may be best) into the mixer.