Blinkenlights Vactrol VCF

VCF built on VLT5C Vactrols. A real old school analog VCF sound

An analog Voltage Controlled Filter with Band Pass, Low Pass and High Pass outputs and voltage controlled resonance.

• +12V 29mA, -12V 27mA
• no 5V connection - 10 pin power connector
• 6HP wide
• 82mm deep
• Voltage controlled cutoff frequency
• Toggle between linear and logarithmic frequency control
• Voltage controlled resonance
• Band Pass, Low Pass, High Pass outputs

The vactrols have a short 'memory' and the relationship between the Control Voltage and the output frequency is not perfectly linear, so this module can introduce interesting artefacts and textures into your sound. Additionally, the resonance is on steroids. You have full control all the way from none, tasteful, sine wave, up to a nasty clipped 'square wave' resonance.

https://www.tindie.com/products/nbirch/vactrol-vcf-for-eurorack-6hp/