The tVCF-Extension adds separate outputs for high-pass, band-pass, and low-pass circuits to the Vermona TwinVCFilter.

In addition, the module provides access to a notch characteristic.

When the TwinVCFilter is operating in serial mode, the outputs of the second channel emit signals processed by both filters.

Moreover, the tVCF-Extension includes two CV stages. Each has a control voltage input, a polarizer, and an output. By pressing a button, users can route CV signals directly to the TwinVCFilter’s cutoff parameters. If no cables are connected to the inputs, the circuits generate control voltages ranging from -5 V to +5 V.