Erica Synths Black VCF Coupler
Couple two filters into a dynamic filter bank
8 HP Eurorack module
The Black VCF Coupler is a satellite module that links the Black High Pass VCF and Black Low Pass VCF together, adding Bandpass and Band Reject filter modes to the system. It provides manual and CV control over center frequency and bandwidth, enabling dynamic filter sweeps and complex timbral shaping. Musically, it transforms two independent filters into a unified, expressive filter bank capable of surgical frequency sculpting or sweeping resonant effects.
Features
- Bandpass filter mode with adjustable center frequency and bandwidth
- Band Reject (notch) filter mode with adjustable center frequency and bandwidth
- Manual control over center frequency
- Manual control over bandwidth
- CV control over center frequency (-5V to +5V)
- CV control over bandwidth (-5V to +5V)
- Allows Black HP VCF and Black LP VCF to still operate independently
- Designed exclusively for use with Black High Pass VCF and Black Low Pass VCF
Controls & Jacks (55)
- Audio Input
- IN 1
- IN 2 — Connection to Black Low Pass VCF module
- Reso 2 CV — Manual control over center frequency for bandpass and band reject filters
- Bandpass Output
- Band Reject Output
- R2 CV — Voltage control input for center frequency (-5V to +5V)
- C-Off1 CV — Manual control over bandwidth for bandpass and band reject filters
- R1 CV — Voltage control input for bandwidth (-5V to +5V)
- C1 CV — Combined filtered output from coupled VCF modules
- IN1 LVL
- C-OFF2 CV
- IN2 LVL
- C2 CV
- Bandpass Mode Select — Toggle between Bandpass and Band Reject filter modes
- BP2 OUT
- LP1 OUT
- Reso1 CV
- LED Indicator 1 — Status LED for bandpass filter activity
- BP1 OUT
- LP2 OUT
- LED Indicator 2 — Status LED for band reject filter activity
- LED Indicator 3 — Status LED for high pass connection
- LED Indicator 4 — Status LED for low pass connection
- LED Indicator 5 — Status LED for module power
- LED Indicator 6 — Status LED for signal presence
- Cutoff 1 — Manual control over center frequency for bandpass and band reject filters
- LED Indicator 7 1 — Status LED indicator
- LED Indicator 8 — Status LED indicator
- LED Indicator 10 — Status LED indicator
- Coupled Output 1 — Combined filtered output from coupled VCF modules
- LINK
- Resonance 2 — Manual control over bandwidth for bandpass and band reject filters
- LED Indicator 7 2 — Status LED indicator
- 7kHz
- BP
- Cutoff 2
- Resonance 1
- Link
- -00
- Mode — Toggle between Bandpass and Band Reject filter modes
- Center Frequency CV Attenuator — Attenuates the amount of CV applied to the center frequency
- Bandwidth CV Attenuator — Attenuates the amount of CV applied to the bandwidth
- High Pass Input
- Low Pass Input — Connection to Black Low Pass VCF module
- Coupled Output 2 — Combined filtered output from coupled VCF modules
- Center Frequency CV
- HP1 Out — Audio signal input for filtering
- IN1 — Connection to Black High Pass VCF module
- Sum Out — Bandpass filtered audio output
- HP2 Out — Band Reject filtered audio output
- Signal Input — Audio signal input for filtering
- HP VCF Link — Connection to Black High Pass VCF module
- LP VCF Link — Connection to Black Low Pass VCF module
- VERIFY_REMOVE — Status LED for bandpass filter activity
How-To Guides
- Classic Bandpass Filter Sweep
- Notch Filter Sweep
- Dynamic Bandwidth Morphing
- Parallel Bandpass and Band Reject
- LFO-Driven Bandpass Animation
- Envelope Bandpass Pluck
- Triple Filter Voice
Explore the interactive Black VCF Coupler panel on BleepDex — tap any control to learn what it does.
