Modeled after the discontinued (but legendary) Linplug Alpha 3, the developer actually teamed up with Claude AI to code this gem and reverse-engineer that highly sought-after synth signal path. It might be simple, but it delivers an incredibly characteristic, sweeping filter that instantly sits right in the mix.

Why AlphaBeta is a Game-Changer for Your Mix & Workflow

While it’s not trying to be a massive, CPU-hogging workstation, this plugin excels at one major thing: pure vibe. Here is why you need to drop this in your VST folder today:

• That Liquid Smooth Filter: Combined with its lush built-in chorus, this filter washes out your signal beautifully. It’s perfect for creating spacey, evolving textures that give your tracks serious headroom.
• A Standalone FX Version: Because the filter is the absolute star of the show, the dev included a separate AlphaBetaFX plugin. You can slap this directly onto your vocal chain, guitar busses, or drum loops to get that same sweeping magic without using the synth engine.
• Instant Vibe Generator: Beat block hitting hard? Hit the Randomize button to instantly generate fresh, usable patches to kickstart your next idea.
• Deep Envelope Control: The Fade and Depth knobs give you total control over the groove. You can dial it from -100% (full negative modulation) to +100% (full envelope range), letting the filter sweep react exactly how you want it to.
• Morphing & FM Capabilities: With two morphable voices per oscillator and FM routing from Osc 2 into Osc 1, you can dial in a gritty or evolving sound source before it even hits that buttery filter.

Tech Specs (Keep it Light)

• Formats: Windows, Mac, & Linux compatible.
• File Size: Extremely lightweight at just 9.20 MB. Say goodbye to CPU overloads.
• Latest Updates (v1.1): The synth now features individual oscillator pitch control knobs for fatter detuning. The FX version gained full envelope controls (ADSR, Amount, and a silence-based Retrigger).

The Verdict

AlphaBeta isn’t trying to replace your massive wavetable synths—and it shouldn’t. It is a highly specialized, characteristic tool that does exactly what it says on the tin. If you need a synth or an FX unit that delivers a thick, liquid-smooth sweeping filter with a gorgeous chorus to wash out your sounds, this plugin slaps. It’s incredibly easy to dial in, takes up almost zero hard drive space, and sounds highly musical right out of the box.

Visit Developer Site

AlphaBeta VST  ( 23 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

44 MB

A modern go at the famous Yamaha CS-80 Synthesizer.

ANALOG OSCILLATORS
UNSTABLE features two synthesis layers, each offering a noise, sawtooth, and pulse wave oscillator, with adjustable pulse width and variable speed pulse width modulation. Unlike the Yamaha CS-80, the level of each oscillator is adjustable, allowing for free mixing of the waveforms, which are closely modeled after the original.

FILTERS
The CS-80 features two state-variable filters in series, which allow for a unique subtractive sound synthesis, unlike most common synthesizers. In UNSTABLE, the high-pass filter is modeled after the original; the low-pass filter, however, features a Moog-style ladder filter with the capability to self-oscillate, providing a vast range of musical harmonics.

RING MODULATOR
The Yamaha CS-80 features the most musical ring modulator ever built, and we did our best to model it as closely as possible, with its own analog-style attack and decay envelope modifying the modulation speed.

RIBBON CONTOLLER
Use the innovative on screen ribbon controller to pitch bend your sound up to an octave.

ARPEGGIATOR
UNSTABLE will feature a sophisticated 16 step arpeggiator with variable note and modulation values. The arpeggiator is functioning, however, all options are not fully implemented yet.

DRIVE
A dedicated drive circuit adds analog warmth and subtle harmonic distortion for loudness and crisp presence that cuts through your mix.

EFFECTS
UNSTABLE features the popular effect engines of DarkStar Reverb and Delay, as well as the luscious WingMen Chorus, to bring your sound to the next level. Imagine a CS-80 with something along the JUNO-60 Chorus and Blackhole reverb.

System Requirements

MAC:
macOS Ventura (13.6) or higher
(Apple silicon Macs supported)
64-bit only

PC:
Windows 10 or 11
64-bit only

Where to put presets included?

“You can get to the preset folder by clicking on the top left button “MORE” in the preset browser.”

Home

Unstable-Synth-v1.0.10  ( 44 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

33 MB

The globe at your fingertips

SyndtSphere is our spherical polyphonic synthesizer. With a minimalistic approach, it offers a unique experience of ‘surfing’ between presets. All parameters morph dynamically based on the proximity of different presets.

By rotating a sphere containing over 70 professionally designed sound states, anyone can effortlessly dial in the perfect sound without needing to adjust specific parameters. SyndtSphere is available for macOS, Windows, iPad and iPhone, making it easy to bring your magical and addictive spinning instrument wherever you go – in the studio, on the stage, on the bus or at a family dinner.

Features
Highly innovative interface, seamlessly browse between 70+ professionally made presets
Save current state
Ping pong delay
Modulation with Pitch Bend Range, Glide and Legato control.

Technical specifications
Requires macOS 10.10 or later (optimized for the M1-processor), Windows 7 (SP1) or later, running a AU, VST or AAX compatible 64-bit host.

Serial is included. Just enter it while offline.

Home

syndtsphere_2_0_0  ( 33 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

48 MB

FREE CHAOTIC MONOSYNTH
Bored of the same old synth sounds? Newfangled Audio’s Pendulate is refreshingly different. Pendulate is a chaotic monosynth that uses a brand new double-pendulum-oscillator to create previously unheard sounds – biting basses, searing leads, and gritty textures. It can smoothly fade from a sine wave to total chaos, with an expanse of territory to explore in between.

Pendulate’s chaotic oscillator is based on the physics of a double pendulum. What initially looks like randomness contains underlying patterns, interconnectedness, constant feedback loops, repetition, self-similarity, fractals, and self-organization. When designing the Pendulate oscillator we took great care to bring out these underlying patterns to create something both chaotic and musical.

Novel chaotic oscillator based on the double pendulum makes sounds you’ve never heard before, but will want to hear again

Wavefolder based on the one in the Buchla 259 Complex Waveform Generator, adding MIX and CUTOFF

Low Pass Gate based on the Buchla 292 adds controls for POLES and RESONANCE

Innovative modulation UI allows modulation over every control from the main page, allowing up to 325 simultaneous modulation routings

MPE support allows amazing control from innovative new controllers

Looping Envelope and LFO each have multiple outputs generated at once, and can modulate each other, like a modular synth

Modulation! Every mod output to every control means up to 325 modulation points in an intuitive single pane

Animations! The Double Pendulum, Wavefolder, and Low Pass Gate modules each have animations to show how each module responds to your input, and to modulation

Fully resizable UI!

Intuitive Midi Learn functionality allows you to assign MIDI CCs to any control with just a click

Three unique color schemes to customize your look

136 Presets including artist presets from Matt Lange and Matthew Wang

macOS 10.9+
64-bit AAX, AU, VST, VST3
All formats are Apple Silicon Compatible

Windows 10+
64-bit AAX, VST, VST3

Home

Pendulate-1.6.9  ( 48 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

size 3 MB

RF-AB303 is a monophonic bass synthesizer for acid basslines.

Features a single oscillator monophonic synth with filters and various effects like Parametric EQ, Distortion, Compression, Delay and Reverb that provides a simulation of the Roland TB-303 vintage analogue bass synthesizer and allows an easy step programming in your DAW. Making possible to create complex acid patterns common in classic Acid House, Techno and Trance music.

VST3

https://ronanfed.rf.gd/

RF-AB303_VST3  ( 3.4 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

size 1 MB  / 5 MB

Bass Station is a monophonic bass synthesizer.

• Two Oscillators that have been carefully modelled to preserve the precise tonal character of the classic sawtooth and square waveforms of the original instruments.
• 12/24 dB Low-pass filter with all the warmth and resonance often lacking in today’s modern digital synthesis methods.
• Intuitive ADSR envelopes.
• Low Frequency Oscillation which can directly control the harmonic content of the sound by pulse width modulation or filter cut-off.
• Oscillator Sync for the most complex and expressive timbres.
• Enhanced Classic panel for greater tweakability:
• The original front panel has been 3D modelled and additional controls have been added for ease of use. The Filter envelope has its own set of ADSR controls and OSC1 and OSC2 have their own section for pitch modulation and PWM control.
• All controls receive MIDI controller numbers for the recording and replay of tweaks during a performance.
• Monophonic.
• 100 “Stunning” Sounds carefully crafted from the Novation factory.
• The Bass Station Plug-In is shipped with the classic originals along with many more totaling 100 sounds for immediate gratification. The patches cover a huge sonic range from screaming leads to phatt funky basses.
• Sounds created in original Bass Stations can be uploaded into Plug In or vice-versa.
• On screen dynamic velocity responsive keyboard. (Mouse position determines velocity).

https://novationmusic.com/en

bassstation-2.3  ( 1 MB )

BassStation-2.3.1 OSX  ( 5 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

size 4.5 MB

RF-Bassline is a monophonic bass synth for Acid basslines.

A single oscillator monophonic synth with a Lowpass Filter, Distortion and Slide which provides a simulation of the Roland TB-303 vintage analogue bass synthesizer.

Making possible to create complex acid patterns common in classic Acid House, Techno and Trance music.

ronanfed.rf.gd/

RonFed_RF-Bassline  ( 4.5 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

size 0.6 MB  / 1.9 MB

Basic is a 3 oscillator subtractive mono-synth.

While it is designed with ease-of-use and simplicity in mind, the panel sits in front of a powerful modern synthesizer engine with an aggressive tone and self-resonating filters that scream when pushed.

• 3 alias-free wavetable oscillators with six waveforms each, and oscillator sync.
• A pair of cascaded filters featuring MS20-style lowpass and highpass, and a bandpass of our own design.
• A four-waveform tempo-syncable LFO with waveshaper.
• ADSR envelopes for amplitude and filter frequency.
• User-definable soft-saturation.
• A simple and easy-to-understand workflow, inspired by the classic topology of vintage analog synths like the Minimoog, SEM, and MS20, but with modern usability.
• Touchscreen-friendly and highly visible user interface.

www.audiodamage.com/

Audio_Damage_Basic  ( 0.6 MB )

Audio_Damage_Basic_x64  ( 0.6 MB )

Audio_Damage_Basic_Mac  ( 1.9 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

size 1 MB

DVS Bass is a monophonic bassline synthesizer.

It comes with an innovative single knob A.D.S.R. envelope control and simple design to enable a wide range of bass sounds to be created quickly.

http://www.dreamvortex.co.uk/

dvs_bass  ( 1 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net

size 0.1 MB

Blowhard is a monophonic lead / bass synthesizer.

n/a

RH-Blowhard  ( 0.1 MB )

VST

We’re audio producers and sound designers with over 20 years of experience in the industry. Our team has lived through the entire evolution of digital audio production.

Our mission? To filter out the junk and bring you only the studio-ready free VSTs that actually compete with paid gear. We do the digging so you can focus on creating.

freevstplugins.net