Take a DJ-mixer-style combined high-pass and low-pass filter, cram it into Eurorack and you have the DJ VCF. A simple formula, but one perfected by Erica's attention to detail, with CV control and adjustable resonance. Supplier's Notes: As its name suggests, the Erica Synths Black DJ VCF provides sound treatment functionality typically found on DJ decks - it is fully open when the cutoff knob is set to 12:00. When turned counter-clockwise, lowpass filtering is applied and when turned clockwise, highpass filtering is applied. The filter also has a nice-sounding resonance parameter. This module provides hands-on control over the sound during the performance, as well as unconventional timbre modulations that are hard to achieve with conventional state variable filters. The Black DJ VCF is a fully analogue design and consists of two VCFs - highpass and lowpass in series and the filter management is done by complex CV routing. CUTOFF This is the main control of the module - manual cutoff frequency adjustment with a twist - it's fully open when the cutoff knob is set to 12:00. When turned counter-clockwise, lowpass filtering is applied and when turned clockwise, highpass filtering is initiated AUDIO LVL Adjust the audio signal level RESONANCE Adjust the resonance level manually. On settings over 1PM, the filter will start to self-oscillate. The resonance is incoming audio signal-sensitive - a signal of greater amplitude may reduce the impact of resonance on the resulting sound CV1 LVL This is the cuto CV attenuverter. Adjust the CV level to your taste! Notice that the cutoff CV works differently compared to conventional state variable filters - it sweeps the filter from closed lowpass through fully open to closed highpass CV2 LVL This is another cuto CV attenuator CV2 IN This is the cuto CV2 input, which is controlled by the attenuator knob AUDIO IN Patch your audio signal here. OUTPUT This is the audio output of the module. CV1 IN This is the cutoff CV1 input. The CV1 level is adjustable by the CV1 LEVEL attenuverter knob. Features Fully analogue DJ-style VCF Manual resonance control Cuto ff CV attenuverter and attenuator Input and output Protection against undesired overvoltage Technical specifications: Audio level: 10Vptp CV level : -10V - +10V Filter slope: 24dB/oct Power consumption: +55mA, -58mA Module width: 10HP Module depth: 35mm