Frap Tools Cunsa at a glance:

With Cunsa, Frap Tools presents a quadruple multimode filter that is much more than the sum of its functions. Depending on the constellation, Cunsa also functions as a saturator, mixer, resonator and oscillator. Filtering and saturating even work in pairs in stereo! A single Cunsa channel offers parallel filter outputs for lowpass, Bandpass and highpass, Lowpass works optionally with 12 or 24dB. For the big cutoff control there is a small additional potentiometer for fine-tuning, this is especially useful when you want to set precise FM sounds. The resonance ranges in all modes up to self-oscillation. The green knob is a saturator whose range of action extends from slightly thickening to well searing; moreover, this refers to the character circuit when in two flavours. Each of these three parameters is equipped with a CV input and attenuator. Functionally, a channel is completed by an audio input (mono), VCA, key tracking, gate/trigger input and a decay envelope. Thanks to intelligently solved interconnections (normalization) of these inputs, even complex patches and sounds succeed with a minimum of cables. For example, it is easy to patch the module for stereo sounds, to process four completely different signals, or to chain the audio path serially and use the control voltages separately or in groups. The decay envelope, together with the VCA, has a similar effect to a Lowpass Gate but is not one. The result is percussive sounds with a decidedly organic tone. The mix outputs for channels 1+2 as well as 3+4 and the sum output make the conclusion. A three-way switch in each filter assigns the filter mode to be heard in the mix section. The Dry output provides the unprocessed signal of all inputs.