Can I adjust the overall tuning of the Subharmonicon?

Yes.  Using the Fine Tune mode, the overall pitch of your Subharmonicon can be adjusted by ± 50 cents (one-half semitone up or down). This allows Subharmonicon to be matched to your other equipment, a particular piece of gear, an out-of-tune track, etc. The default value is zero. If you dial in a specific Fine Tune value (an o set from the original pitch), this value will be stored and will be present every time your Subharmonicon is powered up, or until a new value is set.                

Press and hold the OSC 1 and OSC 2 buttons simultaneously until all four of the QUANTIZE LEDs begin to ash. This indicates the Fine Tune mode.                 

Use the TEMPO knob to adjust the Fine Tune amount. The center position provides no change in tuning. Rotating the TEMPO knob clockwise will increase the Fine Tune setting by a maximum of 50 cents. Rotating the TEMPO knob counter-clockwise will decrease the Fine Tune setting by a maximum of 50 cents.                

Press the QUANTIZE button to exit the Fine Tune mode. The four QUANTIZE LEDs will stop blinking.