All Products
Preview
1/1
NIVIEM DARIA LF01
Coming Soon

NIVIEM DARIA LF01

Precision Transistor Ladder Filter

A premium digital emulation of the legendary transistor ladder filter, originally invented by Dr. Robert Moog and patented in 1969 (US Patent 3,475,623). True 4-pole topology with self-oscillation, dual drive characters, and innovative FROM/TO sweep control.

TBA
ManualQuick Start
Version
1.0
Expected
January 2026
Formats
VST3, Audio Units
Platforms
macOS, Windows
Features

What Makes It Special

True 4-Stage Ladder Topology

Based on US Patent 3,475,623 (1969). Authentic tanh saturation per stage, characteristic passband droop at high resonance, and stable self-oscillation at 100%.

Dual Drive Characters

BJT differential pair (odd harmonics: 3rd, 5th, 7th) for aggressive cutting tone. BF862 JFET (even harmonics: 2nd, 4th) for warm tube-like saturation.

FROM/TO LFO Control

Define your sweep range directly in Hz — set FROM to 200 Hz and TO to 4 kHz, and the LFO sweeps exactly that range with logarithmic interpolation for musical results.

Three Feedback Modes

Clean (pure, precise), Analog (subtle saturation, vintage warmth), and Dirty (heavy saturation, aggressive self-oscillation).

Envelope Follower

Touch-responsive filtering with sensitivity (0-100%), attack (0.1-100ms), release (10-2000ms), and bipolar amount (-100% to +100%). Classic auto-wah response.

Thermal Drift Simulation

Models temperature-dependent behavior of real analog circuits. Adds the 'alive' quality of vintage gear with subtle pitch and filter variations.

Specifications

Inspired ByMoog Transistor Ladder Filter (1969)
Original PatentUS Patent 3,475,623 by Dr. Robert Moog
Filter Topology4-pole transistor ladder (Huovilainen/ZDF)
Cutoff Range20 Hz – 12,000 Hz (exponential)
Resonance0–100% (self-oscillation at 100%)
Filter ModesLow-pass, High-pass, Band-pass
Pole Selection1/2/3/4 poles (6/12/18/24 dB/oct)
Drive ModesLadder / BJT / JFET
Feedback ModesClean / Analog / Dirty
LFO WaveformsSine, Triangle, Saw, Square, S&H, Random
LFO Rate0.01–20 Hz / Tempo sync (1/32 to 4/1)
Oversampling2x (Eco) / 4x (Std/Premium) polyphase FIR
Latency~1.3ms Zero Phase / ~0.05ms Low Latency
Sample Rates44.1 kHz – 192 kHz

Highlights

  • Dr. Robert Moog's 1969 ladder filter topology faithfully recreated
  • Dual drive characters: BJT (odd harmonics) and JFET (even harmonics)
  • FROM/TO LFO: define sweep range in Hz, not percentages
  • Three feedback modes shape resonance character (Clean/Analog/Dirty)
  • Thermal drift simulation for authentic analog instability
  • LP, HP, BP modes with 1-4 pole selection
  • Built-in envelope follower for dynamic playing response
  • Zero-Delay Feedback with transistor saturation in Premium mode
  • 30 factory presets across 7 categories

Under the Hood

US Patent 3,475,623 (1969) transistor ladder topology
Huovilainen non-linear discretization (DAFx 2004)
Zero-Delay Feedback implicit integration (Zavalishin)
First-order ADAA for bandwidth-limited saturation
BJT differential pair: odd harmonic generation
BF862 JFET square-law: even harmonic generation
Polyphase FIR anti-aliasing filters
DC blocking at 20 Hz on output

System Requirements

macOS

  • macOS 11.0 (Big Sur) or later
  • Intel or Apple Silicon (Universal Binary)
  • AU or VST3 compatible host

Windows

  • Windows 10 or later (64-bit)
  • VST3 compatible host