PolyBrute - Tuning

The Fine Tune knob tunes the entire instrument up or down one semitone (a chromatic half-step) and has a center detent at A440.

Four octaves total. When you turn the VCO1 Tune knob, a LED lights up to indicate an octave increment. The knob’s pitch is quantized in semitones.
VCO1’s tuning can be pitch-quantized or respond smoothly when used as a modulation destination.
This is set by pressing and holding Settings then moving the VCO1 Tune knob, selecting the "Vco1 Tune Modulation" menu and desired option and is saved per Preset.

The options are:

VCO2’s Tune knob is always relative to the pitch of VCO1. The interval is set by pressing holding Settings, then moving the VCO2 Tune knob.

In the above menu, the options on the left side affect VCO2’s Tune knob. Those on the right affect its behavior as a modulation destination.

Hold Settings then move the pitch-bend wheel. Here are the options:

Not in this menu. But Bend Range can be Morphed, so you could create a Preset where, for example, the A value is a semitone but the B value is an octave.
This is most easily achieved in the PolyBrute Connect editor software, like so:

The VCOs are designed to combine the warmth of vintage synths with the stability of modern ones, but real analog circuits can require occasional calibration.
Fortunately, the PolyBrute has a routine for this.

Press Settings > 8 (Misc) > 4 (Voice Auto-Tuning) to bring up this menu: From there, you can choose 1 to calibrate the VCOs or 2 for the VCFs (this calibrates the cutoff and resonance ranges of both filters).
The process takes a few minutes and the PolyBrute will not be playable during this time.

It’s also a good idea to give the PolyBrute about five minutes after powering on to warm up and fully stabilize, especially at cooler room temperatures.

Hold Settings then move the Fine Tune knob, which is near the upper right of the control panel.