Bonfire: Pro Analogue Saturation & Warmth Engine

Brad
Feb 3, 2026
6 min read

Bonfire is a high-fidelity VST saturation plugin built for music producers who want authentic analogue weight, density, and harmonic depth, without sacrificing modern digital precision.

Bonfire is included free for Voclr.it Pro users, giving members access to a professional-grade saturation and warmth engine designed to enhance vocals, drums, synths, buses, and full mixes.

Authentic Analogue Character

Bonfire goes far beyond standard distortion and soft clipping. Its signal path is based on physical modelling of classic analogue hardware, recreating the nonlinear behaviour of transformers, tubes, and vintage circuitry that give analogue gear its unmistakable weight and cohesion.

Core Processing Engines

Pro Analogue Warmth Engine

Unlike conventional saturation, the Warmth engine focuses on perceived mass and density rather than sheer distortion, enhancing the body of a sound while remaining musical and controlled.

  • Transformer Core Saturation: Models magnetic hysteresis and low-end thickening below 200Hz for true analogue weight.
  • Asymmetric Triode Modeling: Generates silky even-order harmonics (primarily 2nd harmonic) in the 200Hz–2kHz range for classic tube richness.
  • 5th-Order Harmonic Excitation: A controlled cascade from 2nd to 5th harmonics (x²–x⁵) adds air and presence without weakening the low-mids.
  • Analogue Phase Smearing: Subtle frequency-dependent phase shifts emulate vintage circuitry for a thicker, more integrated sound.
  • Smart Gain Compensation: Automatically manages perceived loudness so added warmth never overwhelms your levels.

Multi-Circuit Saturation (Drive)

The Drive section features four distinct saturation models, each inspired by a different analogue hardware topology.

  • TAPE (Sinusoidal Soft-Clip): Smooth magnetic tape saturation with natural high-frequency compression.
  • TUBE (Asymmetric Exponential): Vacuum tube modelling with rich 2nd-order harmonics for a fat, musical tone.
  • TRANSISTOR (Algebraic S-Curve): Solid-state saturation with a sharper transition and aggressive edge.
  • DIODE (Dead-Band + Hard Clip): Diode bridge distortion with crossover artifacts and hard-clipped peaks for the most aggressive character.

Sub-Frequency Protection

To preserve punch and clarity, Bonfire includes dedicated low-end protection.

  • 80Hz Precision Crossover: Isolates sub-bass frequencies before saturation.
  • Pristine Low-End: Sub frequencies bypass harmonic processing entirely, keeping your low end tight and powerful even under heavy drive.

Technical Specifications

Signal Path

  • Internal Processing: 64-bit floating-point
  • Filters: High-precision IIR Low Cut, High Cut, and internal split filters
  • Parameter Smoothing: Click-free automation with high-resolution smoothing

User Interface

  • Dynamic Metering: Dual L/R input and output LED meters
  • Meter Range: −60dB to +6dB with hardware-style peak decay
  • Design: Premium hardware-flat aesthetic with metallic textures

Parameters

  • Drive: 0–100% (quadratic scaling)
  • Warmth: 0–100%
  • Mix: 0–100% parallel processing
  • Low Cut: 20Hz–500Hz (0.1Hz precision)
  • High Cut: 1kHz–20kHz (0.1Hz precision)
  • Output Gain: −24dB to +24dB

Free for Voclr.it Pro Members

Bonfire is included at no extra cost for Voclr.it Pro users, bringing true analogue saturation, warmth, and character straight into your digital studio.

If you want analogue weight without compromise, Bonfire delivers.

audionode.io — Bringing the heat to your digital studio.

Share This Article

Related Articles