The Unipolar switch is represented by a small (+) button in the LFO section in the layer pages or with a “Unipolar” switch in the Show Modulation section on the left.
In the example below, the Oscillator’s pitch is being modulated with a Triangle wave from LFO1. If LFO1 is in BIPOLAR mode, the pitch will go above, then below, the pitch of the note that was triggered. In UNIPOLAR mode, the pitch would only rise above the pitch of the note being triggered—and the range of the pitch change would be greater.
For example, a Unipolar LFO applied to Oscillator pitch is great for simulating guitar-string bending, as guitarists typically bend strings only in one direction. Another use is for a Unipolar LFO to modulate the filter-cutoff. This will often create better filter sweeps than a bipolar LFO, as a bipolar LFO cycles below the mid-point – so no result is heard if the cutoff frequency is low.
NOTE: If it’s desired to have the value needs to go negative instead of positive, simply select the INVERT button in the MODULATION section.