37 MB

Tesseract Echo is a free, deeply tweakable Multi-Tap Magnetic Tape Delay and FDN Reverb.

Engineered for zero artifacts and maximum character, Tesseract Echo relies on Hermite 4-point interpolation, constant-power panning, and dual-stage diffusion to deliver pristine, wide, and deep spatial effects.

Under the hood:

4-Head Tape Engine: Independent level and pan controls per head, with fractional spacing algorithms.

Non-Linear Tape Filter: 1 pole Highpass and Lowpass filters, and an analog-style Drive stage inside the feedback loop with automatic makeup gain.

Advanced Modulation: Push into audio-rate modulation or use the “Tape” (Wow & Flutter) and “Stepped Random” LFO shapes for mechanical degradation.

Karplus-Strong Engine: Tune the delay time to incoming MIDI notes to synthesize physical strings and tuned resonances.

FDN Reverb & Ducker: A pristine Feedback Delay Network reverb with selectable routing, plus a built-in sidechain compressor to duck the wet signal against the dry input.

Download the plugin for free in multiple formats for Windows, macOS, and Linux.

⚠️ A quick note on donations (Thank you!)
This plugin is strictly 100% free! If you’d like to support my work and fuel the development of future plugins, I am incredibly grateful.
However, if you type a donation amount here at checkout, the platform takes a heavy cut in “shop commissions”.

To avoid these extra fees, please download the plugin for free (just type ‘0’), and consider dropping a tip directly into the Tip Jar / Goal on my main Ko-fi homepage instead! That way, your generous support goes entirely toward the DSP journey.

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Tesseract.Echo.1.1  ( 38 MB )

37 MB

YS – Roomer Delay_ An audio plugin for mixing. The plugin creates a delay effect. Three parallel delays can add a long echo effect or simulate a small room using short delays. Functionality: 1_Manual delay adjustment and linked to the project tempo. 2_High- and low-cut filters. 3_Panning of each channel. 4_Reverb added to the delay. 5_Three modes: 1: Mono (repeats are located according to the panorama as in the source) 2: Haas (a delay (1-100 ms) is added to one of the channels creating a pseudo-stereo effect) 3: Ping-Pong (alternating delay of the left and right channels) 6_ Channel phase inversion. 7_Switch to Mid-Side mode (For stereo sources or in Haas and Ping-Pong mode) 8_ LR-RL switching the direction of Ping-Pong and delay for the Haas effect. The plugin has three versions, two with different designs and sizes and one version with one delay module.

The plugin is made using Synthedit. (A universal VST3 plugin can run on both macOS and Windows. SynthEdit now releases universal VST3 plugins. This means you can offer the same download to both macOS and Windows users. It will “just work.” SynthEdit’s universal VST3 plugins support both Intel-based Macs and Apple Silicon (ARM)-based computers, such as the M1, M2, and later models.)

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YS_-_Rommer-Delay__v.1.0.2  ( 37 MB )

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.

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Ambience.1.0.1  ( 17 MB )

4.50 MB

Authentic 80s rack-style digital reverb. 100% wet output with vintage 12-bit character and Schroeder-style diffusion.

100% Wet Reverb
Pure reverb signal output – no dry signal in the mix. Perfect for:
– Parallel processing with dry signal in your DAW
– Creative sound design
– Authentic vintage rack reverb simulation

80s Rack-Style Character
– 24 kHz Internal Sample Rate – Authentic vintage digital reverb with band-limited frequency response
– 12-bit Quantization – Classic gritty digital character
– TPDF Dither – Smooth quantization
– Stereo Crosstalk – Authentic L/R channel bleed simulating analog circuitry
– Early Reflections – Program-dependent multitapped delay lines for realistic room ambience
– HF Damping – Mode-dependent high-frequency rolloff

Schroeder-Style Algorithm
Parallel comb filters with damping followed by series allpass diffusion.

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WetReverb-v1.0.1  ( 4 MB )

4.14 MB

Authentic 80s rack-style digital delay. 100% wet output with vintage 12-bit character and gritty warmth.

Features
– 100% Wet Delay: Pure delayed signal output with no dry signal mix
– 6 Delay Times: Switchable delay times (20ms, 40ms, 80ms, 120ms, 220ms, 400ms)
– Stereo Processing: Independent left and right channel delay processing
– Visual Metering: Real-time peak level meters for input and output
– VST3 Automation: Full parameter automation support in DAWs

80s Rack-Style Character
– 24 kHz Internal Sample Rate: Authentic vintage digital delay processing with band-limited frequency response
– 12-bit Quantization: Classic gritty digital character with 4096 discrete levels
– TPDF Dither: Smooth quantization with triangular probability density function dither (0.5 LSB)
– Vintage Filtering: 80 Hz high-pass and 9 kHz low-pass (6 dB/oct) for warm character
– Channel Crosstalk: Authentic -40 dB (1%) L/R channel bleed simulating analog circuitry

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WetDelay-v1.1.4  (  MB )

39.4 MB

Alesis Midiverb II and Microverb I emulators. The studio workhorse that defined affordable digital effects × 2 and The bedroom producer’s secret weapon.

There are two types of producers: those who think this reverb sounds “too colored,” and those who refuse to mix a track without it. We meticulously recreated this cult-classic unit because sometimes, perfection is boring. You use it when you want your synth to float in space, your guitars to smear into a lush nostalgic wash, and your mix to have a sound that’s unmistakably its own.

Seven Categories of Classic Effects
All 100 factory programs are included, organized into seven categories that cover every effect type the original hardware offered.

Dual DASP-16 Engine
The MDV-II goes beyond the original hardware with two mathematically modeled DASP-16 chips running in series. Unit A feeds into Unit B, so you can stack a reverse reverb into a chorus, run a gated verb into a delay, or chain any two of the 100 programs together. Each unit has independent program selection, mix, and bypass controls.

Pan-Spread Stereo
Each unit has its own pan control. With both pans centered, the signal runs as a pure series chain — you hear the combined result of A into B. Spread the pans apart and the two stages separate in the stereo field, letting you place each effect independently. It’s a smooth crossfade from stacked mono to wide stereo.

Faithful DASP-16 Emulation
The heart of the MidiVerb II is the custom DASP-16 (Digital Audio Signal Processor) chip designed by Keith Barr. The MDV-II faithfully recreates this chip, reproducing the signal flow of all 100 factory programs at the original 31,250 Hz internal sample rate. Every program produces the same output as the original hardware — including its characteristic warmth and bandwidth-limited charm.

Vintage Mode
Toggle vintage mode with the fuse icon in the toolbar to drop the internal engine from 44.1 kHz down to the original hardware’s native 31,250 Hz sample rate. This lowers the Nyquist ceiling to ~15.6 kHz and stretches reverb tails and delay times to match the original unit, reproducing its characteristic darker, softer tone.

Intuitive Controls
Input Level, Mix, Pan, and Output Level knobs give you precise control over signal flow. A/B buttons switch between the two engines, each with its own program, mix, and pan settings. A per-unit bypass button lets you disable either engine independently. The two-digit numeric keypad, arrow buttons, and drag-to-scroll LED display make program selection fast and familiar. All parameters are fully automatable in your DAW.

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MDV-II.0.5.4  ( 39 MB )

4.92 MB

Springer is an algorithmic stereo spring reverb inspired by physical spring tanks but is a very crude model, built from dual interacting spring lines with dispersion, damping, feedback, and modulation. It’s designed to go from dub-style springyness to phasing laser sounds.

Please note that with all 7 coils and 256 dispersion stages active, this plugin can be quite CPU-intensive (around 15% of CPU usage on my mid-tier machine). I recommend using 2 coils and about 200 stages as the amount of coils beyond 2 most often does not make a huge difference.

Here is a quick overview of the plugins controls:

Version 1.2 adds up to 7 coils and expanded delay controls for all of them.

Version 1.1 adds a Pitch Slider to make the coils “thicker” and the sound deeper. Both versions are included in the download.

Dispersion Stages: How many smear blocks are in the spring. More = thicker, more high-frequency goodness.

Width / Time: How long the spring is. Bigger number = longer delay and tail.

Resonance: How much the spring feeds back. More = more ringing and possible self-oscillation (be careful for values >1).

Coupling: How much spring 1 and spring 2 feed into each other. More = weirder stereo behavior.

Damping: High-frequency loss in the spring. More = darker and less splashy.

Wet Only: Outputs only the spring, no dry signal.

Random Allpass: Randomizes the internal allpass values. Changes the spring character.

Mod Rate: How fast the spring delay moves. Slow = gentle wobble, fast = pitch wobble.

Mod Depth: How far the spring delay moves. More = more unstable sound.

Wet Gain: How loud the reverb is.

Delay 1 / 2: Density delays for spring 1 and spring 2. Changes how busy and smeared the spring sounds.

Install the windows vst (the provided .vst3 folder) in C / Programs / Common Files / VST3.

The source code was mostly made with AIs, so its open source. Use it however you like!

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Springer Spring Reverb VST  ( 19 MB )

32 MB

Dive into DelaySon, a meticulously crafted plugin that captures the soulful warmth and organic character of vintage tape delay units. Its carefully designed emulation delivers an authentic analog sound, inspired by the timeless charm of classic echo machines.

Its intuitive interface and versatile controls make it simple to achieve stunning results, from subtle tape warmth to intricate rhythmic echoes, with unmatched precision and musicality.

Delay Reimagined – Tape Inspired. Effortlessly Musical.

DelaySon features an intuitive interface that provides deep control over your delay processing.
DelaySon is the go-to tool for professional-grade delay effects that are easy to dial in with a modern edge.

Practical Applications

VINTAGE SLAPBACK DELAY

(VOCALS & GUITARS)

Set Time to ~120ms (or sync to 1/16 note)
Adjust Feedback to 15-25% for subtle repeats
Increase Color slightly to introduce analogue warmth
Use Tone to roll off high frequencies for a classic tape feel
RHYTHMIC DELAY FOR

SYNTHS & DRUMS

Sync Delay Time to 1/8 or dotted 1/8
Set Modulation depth to 25-50% for dynamic movement
Push Feedback above 50% for cascading echoes
EXPERIMENTAL & SOUND

DESIGN

Increase Feedback to near-infinity for self-oscillation
Add high modulation depth for warping, psychedelic effects
Use automation on delay time for pitch-shifting echoes

Preset Menu
Create your own presets with your favourite DelaySon configurations and save them for easy recallabillity.

Specs
Supported Operating systems

Mac OSX 10.10 or newer
Windows 10 or newer
Supported platforms

Audio Unit, VST 2.4, VST 3, AAX. All platforms support 64-bit operations.

Technical specifications

Sample Rate Support: up to 192 kHz
Channels: Mono and Stereo

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DelaySon-100  ( 32 MB )

32 MB

Twice The Reverb

Plateau 2 is a powerful plate reverb featuring two reverb instances called tanks which can interact with sends between tanks to create rich highly customizable and spatious reverb effects. Learn more about the features it has to offer by watching the trailer or reading:

A standalone version of the open source VCV Rack module Plateau by Valley Audio.
“Plateau is a plate reverb module based on the famous, Dattorro (1997) design, and is designed to make a dry, lifeless patch sound lush, deep and spacious. However, unlike other reverberators, Plateau attempts to go beyond, providing a wide variety of control combinations and options.”
Available as 64-Bit Windows VST3 and mac VST3+AU

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Plateau2  ( 32 MB )

244 MB

Compact reverb plugin powered by the same proprietary reverb engine as its bigger brother, EXOVERB. Choose from 8 expertly crafted acoustic scenes for a truly authentic sound in modern audio production.

Features:
Compact EXOVERB stereo reverb plugin with 8 selected acoustic scenes
Powered by EXOVERB’s reverb engine with synthesized multi-IRs
Intuitive triangle pad and total control adjusting the acoustic scene

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Exoverb MICRO v1.3  ( 233 MB )