Type: nodetool.audio.synth.VCF
Namespace: nodetool.audio.synth
Description
Voltage-controlled filter: a biquad whose cutoff is modulated by a CV stream. audio, cv, synthesis, vcf, filter, modular
Cutoff = cutoff_hz * 2^(cv * cv_amount) (volts/octave), recomputed every 64 samples (control rate); filter state persists across chunks so chunked output equals a single pass. The audio input drives chunk cadence; CV is frame-aligned with hold-last.
Use cases:
- Classic envelope filter sweeps (ADSR → cutoff_cv)
- Wah/auto-filter via an LFO
- Static tone shaping with nothing patched into cutoff_cv
Properties
| Property | Type | Description | Default |
|---|---|---|---|
| audio | chunk |
Audio chunk stream to filter (drives chunk cadence). | - |
| cutoff_cv | cv |
Cutoff modulation in octaves: cutoff = cutoff_hz * 2^(cv * cv_amount). | - |
| mode | enum |
Filter mode. | lowpass |
| cutoff_hz | float |
Base cutoff frequency in Hz. | 1000 |
| q | float |
Filter resonance (quality factor). | - |
| cv_amount | float |
Octaves of cutoff shift per unit of CV. | 1 |
Outputs
| Output | Type | Description |
|---|---|---|
| chunk | chunk |
Related Nodes
Browse other nodes in the nodetool.audio.synth namespace.