verbos/bark-filter-processor
Bark Filter Processor
12-band fixed filter bank on the Bark psychoacoustic scale with 6th-order bandpass filters, per-band envelope followers, individual band outputs, and a voltage-controlled mixer with center/width/tilt scanning controls.361
Capabilities 6
- Envelope Followerenvelope-follower
- Per-band envelope followers with individual CV outputs and a global decay knob (100ms–3s); also supports cross-patching odd followers to even band levels and vice versa for vocoder-style operation.361
- Fader / Slider Bankfader-bank
- 12-band fixed filter bank with per-band level sliders (graphic-EQ-style fader bank) for spectral sculpting.
- Fixed Filter Bankfixed-filter-bank
- 12 fixed Bark-scale filters; 10 bandpass (36 dB/oct) plus lowpass at 100 Hz and highpass at 10.5 kHz; separate even/odd filter groups with individual outputs.361
- Multiband Filtermultiband-filter
- Vocodervocoder
- Voltage Controlled Mixervoltage-controlled-mixer
- VC mixer blends all 12 band outputs with per-band sliders and CV inputs; center/width/tilt scanning controls sweep the spectral blend; even and odd submix outputs available.361
Jacks 44 (16 in / 28 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (16) | |||
| Band 1 (100 Hz LP) CV In | cv | — | CV input controlling the 100 Hz lowpass band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 10 (5.3 kHz) CV In | cv | — | CV input controlling the 5.3 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 11 (7.7 kHz) CV In | cv | — | CV input controlling the 7.7 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 12 (10.5 kHz HP) CV In | cv | — | CV input controlling the 10.5 kHz highpass band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 2 (300 Hz) CV In | cv | — | CV input controlling the 300 Hz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 3 (510 Hz) CV In | cv | — | CV input controlling the 510 Hz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 4 (770 Hz) CV In | cv | — | CV input controlling the 770 Hz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 5 (1.08 kHz) CV In | cv | — | CV input controlling the 1.08 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 6 (1.48 kHz) CV In | cv | — | CV input controlling the 1.48 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 7 (2 kHz) CV In | cv | — | CV input controlling the 2 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 8 (2.7 kHz) CV In | cv | — | CV input controlling the 2.7 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Band 9 (3.7 kHz) CV In | cv | — | CV input controlling the 3.7 kHz band's gain in the voltage-controlled mixer. Adds to the manual slider position.361 |
| Center CV In | cv | — | CV input controlling the center frequency of the active filter window in the voltage-controlled mixer scan. Reversing attenuator available via the Center knob.361 |
| Even Input | audio | — | Audio input feeding the even-indexed bands (2, 4, 6, 8, 10, 12). Mutually normalled with Odd Input: if only one of Even/Odd is patched, that signal feeds both banks.361 |
| Odd Input | audio | — | Audio input feeding the odd-indexed bands (1, 3, 5, 7, 9, 11). Mutually normalled with Even Input: if only one of Even/Odd is patched, that signal feeds both banks.361 |
| Width CV In | cv | — | CV input controlling the width of the active filter window in the voltage-controlled mixer scan. Reversing attenuator available via the Width knob.361 |
| Outputs (28) | |||
| Band 1 (100 Hz LP) Direct Out | audio | — | Direct output of the 100 Hz lowpass filter (band 1, odd). Pre-mixer, post-filter. Yellow LED above the jack indicates level.361 |
| Band 1 (100 Hz LP) Env Out | cv | — | Envelope follower output for the 100 Hz lowpass band. Tracks per-band amplitude; decay set by the global Follower Decay knob (100 ms to ~3 s). Yellow LED indicates level.361 |
| Band 10 (5.3 kHz) Direct Out | audio | — | Direct output of the 5.3 kHz bandpass filter (band 10, even). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 10 (5.3 kHz) Env Out | cv | — | Envelope follower output for the 5.3 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 11 (7.7 kHz) Direct Out | audio | — | Direct output of the 7.7 kHz bandpass filter (band 11, odd). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 11 (7.7 kHz) Env Out | cv | — | Envelope follower output for the 7.7 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 12 (10.5 kHz HP) Direct Out | audio | — | Direct output of the 10.5 kHz highpass filter (band 12, even). Pre-mixer, post-filter. Yellow LED above the jack indicates level.361 |
| Band 12 (10.5 kHz HP) Env Out | cv | — | Envelope follower output for the 10.5 kHz highpass band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 2 (300 Hz) Direct Out | audio | — | Direct output of the 300 Hz bandpass filter (band 2, even). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 2 (300 Hz) Env Out | cv | — | Envelope follower output for the 300 Hz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 3 (510 Hz) Direct Out | audio | — | Direct output of the 510 Hz bandpass filter (band 3, odd). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 3 (510 Hz) Env Out | cv | — | Envelope follower output for the 510 Hz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 4 (770 Hz) Direct Out | audio | — | Direct output of the 770 Hz bandpass filter (band 4, even). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 4 (770 Hz) Env Out | cv | — | Envelope follower output for the 770 Hz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 5 (1.08 kHz) Direct Out | audio | — | Direct output of the 1.08 kHz bandpass filter (band 5, odd). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 5 (1.08 kHz) Env Out | cv | — | Envelope follower output for the 1.08 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 6 (1.48 kHz) Direct Out | audio | — | Direct output of the 1.48 kHz bandpass filter (band 6, even). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 6 (1.48 kHz) Env Out | cv | — | Envelope follower output for the 1.48 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 7 (2 kHz) Direct Out | audio | — | Direct output of the 2 kHz bandpass filter (band 7, odd). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 7 (2 kHz) Env Out | cv | — | Envelope follower output for the 2 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 8 (2.7 kHz) Direct Out | audio | — | Direct output of the 2.7 kHz bandpass filter (band 8, even). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 8 (2.7 kHz) Env Out | cv | — | Envelope follower output for the 2.7 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Band 9 (3.7 kHz) Direct Out | audio | — | Direct output of the 3.7 kHz bandpass filter (band 9, odd). 6th-order, 36 dB/octave. Pre-mixer, post-filter.361 |
| Band 9 (3.7 kHz) Env Out | cv | — | Envelope follower output for the 3.7 kHz band. Tracks per-band amplitude; decay set by the global Follower Decay knob.361 |
| Even Filter Mix Out | audio | — | Summed output of the even-indexed bands (2, 4, 6, 8, 10, 12) through the voltage-controlled mixer. Gain set by the Even Filter Gain knob. Red LED indicates level.361 |
| Master Follower Out | cv | — | Output of the highest follower level across all bands at any given time. Useful as a global amplitude tracker.361 |
| Master Out | audio | — | Summed output of all 12 bands through the voltage-controlled mixer with Center/Width/Tilt applied. The full filter-bank result.361 |
| Odd Filter Mix Out | audio | — | Summed output of the odd-indexed bands (1, 3, 5, 7, 9, 11) through the voltage-controlled mixer. Gain set by the Odd Filter Gain knob. Red LED indicates level.361 |
Parameters 20
| Name | Type | Range | Behavior |
|---|---|---|---|
| Band 1 (100 Hz LP) Level | fader | — | Manual gain control for the 100 Hz lowpass band in the voltage-controlled mixer. Adds with the corresponding Band 1 CV In. Yellow LED above the slider indicates gain.361 |
| Band 10 (5.3 kHz) Level | fader | — | Manual gain control for the 5.3 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 10 CV In.361 |
| Band 11 (7.7 kHz) Level | fader | — | Manual gain control for the 7.7 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 11 CV In.361 |
| Band 12 (10.5 kHz HP) Level | fader | — | Manual gain control for the 10.5 kHz highpass band in the voltage-controlled mixer. Adds with the corresponding Band 12 CV In.361 |
| Band 2 (300 Hz) Level | fader | — | Manual gain control for the 300 Hz band in the voltage-controlled mixer. Adds with the corresponding Band 2 CV In.361 |
| Band 3 (510 Hz) Level | fader | — | Manual gain control for the 510 Hz band in the voltage-controlled mixer. Adds with the corresponding Band 3 CV In.361 |
| Band 4 (770 Hz) Level | fader | — | Manual gain control for the 770 Hz band in the voltage-controlled mixer. Adds with the corresponding Band 4 CV In.361 |
| Band 5 (1.08 kHz) Level | fader | — | Manual gain control for the 1.08 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 5 CV In.361 |
| Band 6 (1.48 kHz) Level | fader | — | Manual gain control for the 1.48 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 6 CV In.361 |
| Band 7 (2 kHz) Level | fader | — | Manual gain control for the 2 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 7 CV In.361 |
| Band 8 (2.7 kHz) Level | fader | — | Manual gain control for the 2.7 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 8 CV In.361 |
| Band 9 (3.7 kHz) Level | fader | — | Manual gain control for the 3.7 kHz band in the voltage-controlled mixer. Adds with the corresponding Band 9 CV In.361 |
| Center | knob | — | Sets the center frequency of the active filter window in the voltage-controlled mixer scan. Combined with Width, this sweeps the filter bank like a bandpass filter with adjustable bandwidth.361 |
| Even Filter Gain | knob | — | Output gain for the even-indexed band mix (Even Filter Mix Out).361 |
| Even-to-Odd Vocoder | switch | — | Routes the even-indexed envelope followers to control the odd-indexed channels' levels in the voltage-controlled mixer. Approximates a 6-band vocoder using the even bands as the modulator and the odd bands as the carrier.361 |
| Follower Decay | knob | — | Global decay-time knob for all 12 envelope followers. Range approximately 100 ms to 3 seconds.361 |
| Odd Filter Gain | knob | — | Output gain for the odd-indexed band mix (Odd Filter Mix Out).361 |
| Odd-to-Even Vocoder | switch | — | Routes the odd-indexed envelope followers to control the even-indexed channels' levels in the voltage-controlled mixer. Approximates a 6-band vocoder using the odd bands as the modulator and the even bands as the carrier.361 |
| Tilt | knob | — | Spectral tilt control on the voltage-controlled mixer. Turning up favors higher frequencies and reduces lower; turning down does the inverse. Centered: no tilt applied.361 |
| Width | knob | — | Sets the width of the active filter window in the voltage-controlled mixer scan. Combined with Center, this sweeps the filter bank like a bandpass filter.361 |
Firmware history 0 versions
No firmware history recorded.
References 2
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[361]
Verbos Bark Filter Processor Tech Cardmanual● verified 2026-05-15
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[362]
Verbos Bark Filter Processor product pageproduct_page⚠ verified 2026-05-15 · manufacturer changed since last verified