LPF, BPF and HPF modes, analog distortion and analog positive and negative feedback.
Please see the LD3, Tiny LD, Anamono X, Xmini user manuals on details how to install this.
After installation, you must set it up in the menu's, in order to make it work properly.
On Anamono X go to "More..>Common>Filter Settings", and set either filter 1 or 2 to: 1-Most Filters, depending on in which filter slot you installed it.
On LD3, Tiny LD, Xmini go to "Edit>More...>VCF Type", and set the filter to: 1-Most Filters.
Parameters:
Cut: Filter cutoff frequency.
Peaks: Second filter block cutoff frequency, either as an offset to Cut, or as an absolute value, depending on the setting of the Peaks parameter on VCF edit page 2.
Reso: Filter resonance.
Cut3/Feed: Negative values: Negative analog feedback, positive values: Positive analog feedback.
LPF: Switches the filter low pass output on or off.
BPF: Switches the filter band pass output on or off.
HPF: Switches the filter high pass output on or off.
Out1/2: Turns up the analog distortion effect on the filter output 2.