Unusable Engineering ApS
Unusable Engineering

Creative audio plugins with straight forward interfaces & slot sequencers

Unusable Engineering is about building instruments and tools that are simple yet surprising. The lineup spans modelled character effects, science-native tools, unique synthesizers and geometry-based effects. Different approaches but with the same goal: expressive and fun tools with clear controls, motion and strong musical sweet spots. The unusable plugins don't use plugin managers or call home functions.

No SubscriptionsMac/Win AU/VST3Fair PricesBuilt to Inspire
If you have bought one of my plugins or bundles in the past, please check your account page for the best crossgrade offers before buying anything here.
Featured

Current lineup

View bundles
Currents & Nostalgia
VA SynthAU/VST3Mac/Win

Currents & Nostalgia

A 6-voice virtual analog synth built around two circuit-modelled saw-core oscillators, classic filters and two independent slot systems for musical movement.

Coming soonRelease: 9th Nov 2026 Price: €89 incl. Danish VAT
View
Partials & Discrepancies
Additive SynthAU/VST3Mac/Win

Partials & Discrepancies

An 8-voice additive polysynth with slot-based motion, up to 128 partials per voice, and semi-controlled divergence between voices.

€79.00incl. 25% Danish VAT€63.20 excl. VAT
Curves & Membranes
Bezier SynthAU/VST3Mac/Win

Curves & Membranes

A visual one-oscillator synth built around Bézier and node wave shaping, orbital motion, and a membrane-style filter model.

€69.00incl. 25% Danish VAT€55.20 excl. VAT
Residual Breakdown
Sequenced FuzzAU/VST3Mac/Win

Residual Breakdown

A transistor-inspired fuzz with self-oscillation, pitch quantization, side-chain-controlled mix, and an 8-slot sequencer.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Quadrant Modulator
Ring-ModAU/VST3Mac/Win

Quadrant Modulator

A four-quadrant multiplier with a bezier oscillator, pitch following, one-shot shaping, and an 8-slot waveform sequencer.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Geometry Delay
DelayAU/VST3Mac/Win

Geometry Delay

A quick, surprising multi-tap delay where room shape and node motion control the echoes.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Geometry Reverb
ReverbAU/VST3Mac/Win

Geometry Reverb

A hall reverb that uses a room-based abstraction model with 3D orbital modulation.

Giftfor Paying Customers
View
Binaural Modulator
Auto-panAU/VST3Mac/Win

Binaural Modulator

A room-model auto-pan that can drift into tremolo, Leslie-ish movement, chorus, and more.

Free
Synaptic Resonance
Neural VocoderAU/VST3Mac/Win

Synaptic Resonance

A neural vocoder-style effect where input signal excites a 2D simulation that drives a 40-band resonant filter bank.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Grain Discharge
GranularAU/VST3Mac/Win

Grain Discharge

A cavitation-driven granular effect where fluid simulation events spawn grains from recent input audio history.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Cavitation Fractures
DistortionAU/VST3Mac/Win

Cavitation Fractures

A fluid-dynamics processor that can add fracture, erode narrow bands, or pull event-shaped holes from the signal.

Free
Spectral Pressure Chamber
DynamicsAU/VST3Mac/Win

Spectral Pressure Chamber

A thermodynamic multiband effect where spectral pressure drives dynamics, saturation, and resonance.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Frequency Guillotine
FilterbankAU/VST3Mac/Win

Frequency Guillotine

A 16-band spectral slicer for vocoder-style shaping, stereo motion, and rhythmic spectral manipulation.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Ensemble Diffuser
ModulationAU/VST3Mac/Win

Ensemble Diffuser

Dual-circuit modulation with stringer-style ensemble motion and hot vintage-inspired phasing.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Harmonic Dissector
FilterAU/VST3Mac/Win

Harmonic Dissector

Dual parallel resonant EQ-like filters with slewed slots, clocked stepping, stereo motion, and harmonic edge.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Tension Reactor
ReverbAU/VST3Mac/Win

Tension Reactor

A physically modelled spring reverb with reactive tank behavior, metallic depth, and unstable tails.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Entropy Encoder
DegradationAU/VST3Mac/Win

Entropy Encoder

A creative codec-decay effect for digital nostalgia and intentional deconstruction and loss.

€29.00incl. 25% Danish VAT€23.20 excl. VAT
Emulated Effects Pack
BundleModelled character tools

Emulated Effects Pack

Six circuit-inspired effects for fuzz, modulation, filtering, spring space, and controlled digital decay.

€79.00€174.00incl. 25% Danish VAT€63.20 excl. VAT
Scientist Suite
BundleScience-native lineup

Scientist Suite

The science-metaphor lineup: Curves & Membranes, Quadrant Modulator, Spectral Pressure Chamber, Cavitation Fractures, Grain Discharge, and Synaptic Resonance.

€99.00€185.00incl. 25% Danish VAT€79.20 excl. VAT
Full Suite v2
Bundle16 plugins

Full Suite v2

Two synthesizers and all fourteen effects in one package. Currents & Nostalgia is sold separately.

€179.00€496.00incl. 25% Danish VAT€143.20 excl. VAT