How Does It Work?#

VA Diode is a virtual-analog 4-pole diode ladder lowpass with resonance and post-filter overdrive, designed for more volatile behavior than the standard ladder modules.

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Quick Overview#

• VA Diode is a single-input, single-output lowpass filter.
• It offers Cutoff, Resonance, and Overdrive.
• The cutoff range is 20 Hz to 20000 Hz.
• Resonance ranges from 0 to 1.
• Overdrive ranges from 0 to 1.

Inputs And Outputs#

Port	Type	What It Does
In	Audio	Source signal for the diode ladder core.
Cut	CV	Modulates cutoff frequency.
Res	CV	Modulates resonance amount.
Drive	CV	Modulates overdrive amount.
Out	Audio	Filtered and driven output.

Controls Reference#

Control	Range	Default	Behavior
Cutoff	20..20000 Hz	500 Hz	Sets the filter cutoff.
Resonance	0..1	0.1	Sets the ladder feedback amount.
Overdrive	0..1	0	Adds output saturation after the filter stage.

Signal Path#

• The input is processed by a 4-stage diode ladder lowpass structure.
• Resonance changes the internal feedback amount of that ladder.
• Overdrive is applied after the filter output, not as a separate output gain stage.

CV Behavior#

• Cut uses exponential modulation.
• Res uses linear bipolar modulation and is clamped to 0..1.
• Drive uses linear modulation and is clamped to 0..1.
• The panel silk marks Cutoff and Reso CV as -5V~+5V, and Drive CV as 0V~+5V.

Panel Layout#

• The large center knob is Cutoff.
• The small left knob is RESO.
• The small right knob is DRIVE.
• The central artwork shows a stylized four-stage diode ladder path from IN to OUT.
• CV jacks sit above the bottom SIGNAL IN and SIGNAL OUT jacks.