Variable Bandwidth Bandpass Filter

The Serge Variable Bandwidth Filter (VCF2) is probably the rarest classic filter in the Serge system, offering a unique combination of 2 filters. According to the 1983 Serge catalog, the “VARIABLE BANDWIDTH VCF (VCF2) has a band-pass output which can be varied manually or with voltage control. This is a standard response synthesizer VCF, typical of filters used in many studio systems. In the VCF2, two state-variable VCF's are connected in series to produce a total of five outputs. High pass, low pass, two fixed bandwidth outputs, and one variable bandwidth output are available. The outputs are all flat-response (no resonance) so the VCF2 is suitable for processing concrete sounds without introducing resonant coloration to the timbres. Under voltage or manual control, cut-off frequency of the high and low-pass outputs are affected, as well as the center frequency of the two band-pass outputs. Both center frequency and bandwidth are independently controllable on the variable bandwidth output."

Now - for the first time, designed and licensed by Serge - the VCF2 is available as a eurorack module. A new switch has been added which determines if the CV-controls are routed to the first (left), second (right), or both filters, bringing even more sonic options than the original.

Some details of the Random*Source Serge VCF2 module:

• Original Serge design, under license and in cooperation with Serge Tcherepnin
• Uses for High-end VCAs
• Eurorack format (3U), 18 hp
• Power consumption: 45mA @ +12V, 45mA @ -12V
• Module depth: < 30mm (1.2")

https://randomsource.net/serge_eurorack?mod=RS_VCF2_E

• 45 mA +12V
• 45 mA -12V
• 0 mA 5V
• 30 mm Depth

Available as an assembled Module and as a DIY project.

This Module is currently available.