17.5 MB

Ambience is a high-quality, open-source algorithmic reverb VST3 plugin built on a 16-channel Feedback Delay Network (FDN) architecture. Designed with professional audio standards in mind, it delivers rich, natural-sounding reverberation ranging from intimate studio rooms to vast concert halls and beyond — with the precision and stability demanded by real-world production environments.

Schroeder, Moorer, Jot — for sixty years, the foundations of commercial reverb have barely moved. The differences are presets and UI.

Ambience reimplements that foundation from primary academic sources — FWHT feedback matrices, nearest-prime delay allocation, Välimäki-Liski 10-band GEQ, ISM-based early reflections. Research-paper DSP, end to end.

A Fast Walsh-Hadamard Transform forms the feedback matrix, delivering dense, colorless diffusion. The 16 delay lines are tuned to mutually coprime primes on a logarithmic scale, eliminating comb-filter artifacts at any room size.

ROOM1 / ROOM2 / HALL1 / HALL2 / PLATE / SPRING / GOLDFOIL — each algorithm uses a distinct topological routing, Allpass gain structure, and early-reflection pattern. Seven completely different reverb characters.

Each FDN channel hosts a 10-band biquad GEQ cascade. The plugin solves a Weighted Least Squares system in real time to follow target RT60 curves with surgical accuracy across the full audible band.

Early reflections are generated via the Image Source Method, tuned per algorithm for perceptually accurate pre-echo with full stereo imaging control.

Each of the 16 FDN channels is modulated by an independent bandlimited-noise LFO, initialized via a Golden-Ratio Weyl sequence to guarantee mutually asynchronous, non-periodic motion.

Anti-Derivative Anti-Aliasing in four flavors — Warm (Vicanek), Tape (Padé rational), Tube (asymmetric ADAA), Hard (ADAA clip). Texture without aliasing artifacts.

One PRO button unlocks per-band RT60 multipliers from 31 Hz to 16 kHz, Low / Mid / High Tilt EQ, and saturation type selection.
The live RT60 graph overlays the effective curve (orange — including HF Damping & LF Absorption) on top of the preset reference (gray). Mix by looking, not just by listening.

Every world-class hall, studio, plate and spring you’d wish for — modeled and included. No DLC. No upgrades.

Visit Developer Site

Ambience.1.0.1  ( 17 MB )

Ambience is a reverb that rivals the quality of the best commercial reverbs.
You are free to decide yourself how much you want to pay for it, and when.

http://www.smartelectronix.com/

Ambience ( 0.39 MB )

ambience-full-os9-vst ( 0.40 MB )

ambience-full-osx-vst ( 0.40 MB )

size 1 MB