— Arna · Reverb plugin · 2026 —

ONE KNOB.OR NINE.

Arna is a reverb plugin built on a Differentiable Geometric Feedback Delay Network with brain-driven spectral analysis. One DSP engine, three editions: 1snob (free, one knob), Full (nine knobs, coming soon), and Lab (calibration rig). VST3 / AU on macOS.

Get the free editionTalk to Leandro
— Premise

REVERB PLUGINS ARE POWERFUL. MOST OF THEM ARE BLIND.

Arna's brain listens to what you feed it — peaks, valleys, transients, sustained content — and shapes the tail with intent. The Journey lives inside one knob: as you turn it, size, decay, tone and diffusion move together along five honest phases. No menu diving. No cargo-cult.

Automate the knob and you get tape-like, breathing textures — by design, not by accident.

— The journey

FIVE SPACES. ONE KNOB.

k traverses a thermometer of five anchors. Colour is interpolated continuously by the engine; sound follows. The plugin paints the journey behind the knob in real time.

  1. PhasekSound
  2. Tight0.00 – 0.20Neutral, dry, controlled.
  3. Room0.20 – 0.40Natural, defined.
  4. Bloom0.40 – 0.70Musical bloom.
  5. Sentient0.70 – 0.90The plugin's own voice.
  6. Crown0.90 – 1.00Deep ember, infinite.
— Three editions

ONE ENGINE. THREE BINARIES.

Same dsp/ source across all three. Only the wrapper layer changes. The 1snob edition is free for personal and commercial music production.

Free

1snob

One knob, one fader, one click. The single knob drives the full reverb engine — size, decay, tone, and diffusion all move together along the Journey.

Controls
1 knob · 1 fader · 1 click
For
Anyone making music.
Price
Free
Coming soon

Arna Full

Nine knobs, A/B compare, presets. Same DiffGFDN engine, full hands-on control over predelay, reflections, body, decay, bloom, texture, width, tone and mix.

Controls
9 knobs · A/B · presets
For
Mix engineers and producers who shape spaces by hand.
Price
Paid licence
Internal

Arna Lab

The calibration rig: 10-tab panel, 100+ faders, 13 visualizers. The instrument used to tune the engine itself.

Controls
10 tabs · 100+ faders · 13 visualizers
For
DSP work and reference renders.
Price
Not for sale
— Full mode

NINE KNOBS, ONE CRAFT.

Predelay through Mix, in two rows. Every knob renders identically: cream body, copper indicator, no per-knob accent fill. You find a knob by label and position, not by hue.

PredelayDistance before the room answers. 0–200 ms.
EarlyLevel of first reflections.
BodyMid-tail density.
DecayTail length, 0.1 s to 30 s.
BloomLate reverb swell.
TextureAlgorithmic character of the diffusion.
WidthStereo image, 0–200%.
ToneHigh-frequency damping.
MixDry / wet balance.
— Listen

RAW MATERIAL.

Three internal test renders at 44.1 kHz, no post-processing. They show what the engine does, not what a finished record sounds like.

  • Sine, MIDI-drivenA sine through Arna with a MIDI-played pitch envelope.
  • Impulse, hall presetSingle Dirac impulse rendered through a long-tail preset.
  • Chord, freeze onA held chord with the Freeze button engaged — infinite hold.
— Specs

BUILT TO SHIP.

Arna plugin mockup, full mode
Engine
DiffGFDN · brain-driven spectral analysis
Formats
VST3 · AU
Platform
macOS · Apple Silicon + Intel
Built with
C++20 · JUCE 8.0.6
Validated by
pluginval Level 10 · ctest · torture battery
Window
800 × 600 px (1snob) · resizable in Full
VST3AUmacOSApple SiliconIntelDiffGFDNJUCE 8
— Want first access when Full ships?Get on the list