The Erica Synths Black 3109 VCF/VCA is a lowpass filter and voltage-controlled amplifier combo built around the AS3109 VCF integrated circuit, a contemporary version of the IR3109 chip, found on vintage Roland synths such as the Jupiter series, Juno series and the SH-101.

Erica Synths Black Dual VCF is a dual multimode filter with CV control over cutoff and resonance for serious modular patches.

Erica Synths Black LPG is our take on Lowpass Gate idea – it’s designed from scratch featuring 2nd order lowpass VCF (the original Buchla lowpass gate was 1st order VCF) and VCA combo with distinct resonance circuit on top.

 Erica Synths Black Polivoks VCF is one of the most authentic sounding emulations of the famous Russian synth the Formanta Radio Factory Polivoks.

As its name suggests, the Erica Synths DJ VCF STEREO module provides sound treatment functionality typically found on DJ decks – it is fully open when the cutoff knob is at 12:00. When turned counter-clockwise, lowpass filtering is applied and when turned clockwise, highpass filtering is initiated.

The Fusion VCF3 is resonant 24dB/oct lowpass filter of unique design that combines vacuum tubes and vactrols, providing distinct, soft filtering. For more versatility, the independent audio mixer and buffered multiple is incorporated in the module, and, most importantly – a CV recorder that records motion of the potentiometer, so you can design advanced modulation patterns.

1973 - Dave Rossum nimmt den Filterkern der Moog'schen Kaskade in Angriff, überarbeitet den Rest und basiert darauf sein 2100-Tiefpassfilter für das E-Mu Modularsystem.
2015 - findet die Evolution des 2100, Daves Lieblingsfilter, statt und das Ergebnis ist just dieses Euro-Modul, das EVOLUTION.

Following in the tradition of Evolution and Morpheus, LINNAEUS represents yet another Dave Rossum innovation in filter technology.

Das Morpheus ist ein erstklassiges 14-Pol Digitalfilter, das dem Emu Morpheus Synthesizer und seiner Z-Plane-Technologie von 1993 entstammt. Es verwendet komplexe Filterkombinationen, die resonante Klangcharakteristika modellieren und durch spannungsgesteuertes Morphing dreidimensional interpolieren, um nie zuvor gehörte Klänge zu erzeugen. Eigene Filterkombinationen sind speicherbar und sequentiell durchschaltbar.