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Ladder Filter
A 4-pole MOOG-style LADDER low-pass — the warm, resonant, self-oscillating filter the biquad can't be. Cutoff sweeps the corner (modulate it with an LFO or envelope for the classic synth wobble / acid squelch); Resonance peaks at the cutoff and, near maximum, SELF-OSCILLATES into a pure sine you can play; Drive saturates the signal in the transistor stages for grit. Melody-owned DSP (ladder-rt). Insert it after an oscillator for that subtractive-synth character the biquad filter lacks.
Inputs
| Port | Signal |
|---|---|
| audio_in | audio · audio |
| cutoff | audio · hz |
| Reso | audio · norm |
Outputs
| Port | Signal |
|---|---|
| audio_out | audio · audio |
Parameters
| Parameter | Range | Default |
|---|---|---|
| Cutoff | 20 – 20000 Hz | 1200 |
| Reso | 0 – 100 % | 20 |
| Drive | 0 – 100 % | 20 |
Used in these rigs
Acid Bass · Bowed Pad (Tasto · Normale · Ponticello) · Drone (Harmonium · Bagpipe) · Squeezebox (Accordion · Bandoneón) · Wind (Flute · Clarinet · Oboe · Sax)
More process nodes
3-Band EQ · 3D Orbit · 3D Spatial · Amp Model · Auto-Pan · Band-pass Filter · Bitcrush · Buffer Stutter · Cabinet · Chorus · Compressor · Delay