Kjaerhus Audio Classic Series

Kjaerhus free vst bundle

Kjaerhus Audio Classic Series is a collection of free VST audio plugins made by Kjaerhus Audio.

The Audio Classic Serie is a bundle of Kjaerhus 9 Classic Serie mixing and mastering audio plugins. Including the classic auto-filter, chorus, compressor, delay, EQ, flanger, limiter, phaser and reverb. The classic serie goal is to emulate the warm and rich sound of vintage high end analog gear from the 70’s and 80’s eras. Kjaerhus unique “Warmth & Saturation” algorithms will give your sound a sweet and lively analog color. And it’s totally free !


  • Chorus
  • Compressor
  • Limiter
  • Delay
  • EQ
  • Phaser, flanger
  • Reverb
  • Auto-Filter


YALA free compressor by Analog Obsession

YALA is a free compressor VST, Audio Unit plugin developed by Analog Obsession. Compatible OS(s): Windows 64b, macOS.

Yet Another Limiting Amplifier!

Burn it with YALA! Famous Vari-Mu Limiting Amplifier in your DAW! Add shine to your mixes. Level vocals and basses especially but it’s good for all purposes! Even without compressor use it as line amp or summing amp.

True Component & Circuit Modeling

Re-drawing and designing original circuit carefully and emulated original fingerprint of gear with our technology. Carefully designed transformers and tubes. Fully emulated vari-mu limiting amplifier.

Supported Plug-in Formats

AU – VST2 (Win/OSX).

Supported Operating Systems
Mac OS X 10.7 through 10.14
Windows 7 through 10
Any VST/AU-compatible host running on a supported operating system.

Intel CPU only (minimum 2 GHz recommended).

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended).

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM.



XPressor free compressor by e-phonic

XPressor is a free compressor VST plugin developed by e-phonic. Compatible OS(s): Windows.

XPressor is a softknee compressor with a built-in stereo enhancer.http://www.e-phonic.com/


WTComp free compressor by Plektron

WTComp is a free compressor VST plugin developed by Plektron. Compatible OS(s): Windows.

WTComp is an analogue tube compressor. It distinguishes itself from a common compressor due to its simple use. The only thing you have to do is to set the warm-level (compression) instead of going crazy with dozens of parameters.

WTComp is based on the parallel compression technique that maximize the output signal rather than destroy the sound’s dynamic. The tube simulation makes the sound warm and loads without distortion, processing a “fat” wave without square peaks.

The advanced internal structure includes an intelligent audio-clip system.

It is deal for mastering and use on single tracks.

Made with SynthMaker


Vitamin C

Vitamin C free compressor by Distorque

Vitamin C is a free compressor VST plugin developed by Distorque. Compatible OS(s): Windows.

Vitamin C is an emulation of an Orange Squeezer guitar compressor, with added controls for tweaking. It runs in mono or stereo, and has selectable 2x oversampling. Note that this is not a studio compressor, Vitamin C has the quirks and imperfections of the original Orange Squeezer that gave it its unique character.

The Orange Squeezer is a guitar compressor that was released in the 1970s as part of the Dan Armstrong effect line. It has been used prominently by artists like Mark Knopfler and Jeff Baxter for its smooth squish and sustain.


  • Switchable 2x oversampling.
  • 32-bit and 64-bit versions.
  • Stereo and Mono operation.
  • Bass and Treble EQ.
  • Dry blend control.
  • Additional compressor controls: Attack, Release, Threshold, and Ratio.


Vanilla Compressor

ZynAddSubFX free software-synthesizer by paulnasca 2

Vanilla Compressor is a free compressor VST plugin developed by ChunkWare. Compatible OS(s): Windows.

The Vanilla Compressor is a general-purpose, stereo compressor plugin, with optional sidechain input. It can be used on individual instruments, across aux busses, or even as a mastering effect. Its fine-tuned, “smooth as buttah” sidechain and specialized release shapes make it equally at home with vocals, drums, guitars and full mixes. Use it sparingly for subtle, transparent “tightening”; or drive it hard and fast for deep, “balls-to-the-walls” pumping.

The Vanilla Compressor is currently in the alpha stage, and is free to download and evaluate. After development is completed, the final release will be available for purchase for US$50.


  • Threshold: -40dB to 0dB in 0.1dB increments.
  • Ratio: 1:1 (no compression) to 20:1 (limiting).
  • Soft-knee: 0dB (linear/”hard knee”) to 12dB (nonlinear/”soft knee”) in 0.5dB steps.
  • Max Make-up: Maximizes the output gain to 0dB, such that it is proportional to the threshold and ratio parameters.
  • Compressor Output: -40dB to +40dB in 0.1dB increments.
  • Attack.
  • Release.
  • Release Shape: Smooth, Pump, ARC-1 & ARC-2 (Auto Release Control).
  • Key Input (for sidechain).
  • Detection: Peak and RMS.
  • SideChain Filter: Let the compressor react to certain frequencies, while ignoring others. Off, Low, High and Band settings.
  • Frequency: Cutoff frequency for the sidechain filter (60Hz to 6kHz).
  • Listen: Listen to the sidechain (control) signal at the output of the filter, before it is rectified/averaged.
  • Mix: Wet/Dry mix.
  • Output: -40dB to +40dB in 0.1dB increments.
  • Limiter.

The Vanilla Compressor uses RMS power summing for stereo linking, to maintain an accurate image of stereo signals.


UltraComp free compressor by Studio Toolz

UltraComp is a free compressor VST plugin developed by Studio Toolz. Compatible OS(s): Windows.

UltraComp is here, this beautiful vintage compressor is for perfect for both audio professionals or the bedroom producer. With its simple control panel it is easy to use and sounds absolutely fantastic. UltraComp can be used on individual instrument tracks or on your master buss.


  • Beautiful classic sounding compressor.
  • Can be used on instrument tracks and the master buss.
  • Controls for Threshold, Ratio, Attack, Release, Gain, Power.
  • Professional vintage analogue GUI Design.
  • Very low CPU usage.

System Requirements

PC running a Windows operating system. VST compatible DAW or VST hosting software.

Host Compatibility

UltraComp has been tested and works in Cubase, Sonar, Ableton Live, FL Studio, Reaper, Energy XT and works without issue. It is recommended that you always try out the demo before purchases to ensure that the plugin is compatible with your system.

Made with SynthMaker


TLs Saturated Driver

TLs Saturated Driver free compressor by TbT

TLs Saturated Driver is a free compressor VST plugin developed by TbT. Compatible OS(s): Windows.

TbT describe TLs Saturated Driver as “something in between a Limiter/Compressor to shape them peaks….”.


  • Adjustable input gain between -16db to 16db. Input signal should stay below 0db.
  • Adjustable Attack from 0 to 100%.
  • Adjustable Release from 0 to 100%.
  • Adjustable Driver from 0 to 100%.
  • Boost mode to use a “warmer” algorithm.
  • 2X mode to produce more aggressive results.
  • 10 presets.
  • Supported samplerates: 44.1khz – 192khz.



ThrillseekerLA free compressor by Variety Of Sound

ThrillseekerLA is a free compressor VST plugin developed by Variety Of Sound. Compatible OS(s): Windows.

ThrillseekerLA – digital stereo leveling amplifier with truly analog qualities.

At a glance:

  • Sophisticated and deep gain riding full of musical character and attitude but with virtually no inter-modulation (IM) distortion artifacts
  • Feedback compression design w/o any samplerate based delay in the loop.
  • Classic input level driven two knob design with additional manual attack and release time interventions.
  • Highly program dependent envelope timing adoption offering attack times ranging from “instantaneously” up to around 100ms and release times from 30ms up to several seconds.
  • Mix level switch to adopt the plug-ins internal gain staging to mixing levels at around -18dBFS.
  • Custom SC filter option to attenuate the SC bass response while slightly boosting the HF spectrum.
  • Additional one pole (6dB per octave) SC low-cut filter adjustable from 20 to 500Hz.
  • External sidechain support.
  • Switchable Input/GR/Output metering display.
  • Variable compression range control from 0 to 100%.

ThrillseekerLA not only introduces way smooth gain riding capabilities but first and foremost features a non-linear amplifier stage which is based on a non-linearity with memory yielding creamy signal coloration duties:

  • Custom algorithms based on a true stateful non-linear saturation model.
  • Compression and load dependent 2nd order harmonic distortion generation.
  • Controllable odd order total harmonic distortion generation.
  • Six individual preset distortion profiles offering different tonal qualities like warmth and top-end sheen or simply improved depth perception.
  • Authentic audio transformer simulation including typical LF distortions as well as frequency and load dependent analog circuit effects.


  • Requires Win32 compatible system with SSE2 (or higher) instruction set support.
  • Tested and known to work in many VST compatible hosts.
  • Advanced DSP processing.
  • Assembler optimized audio engine.


ThrillseekerLA will be released in Q1/2012 under a freeware license.

Made with SynthMaker



THIS GOES TO 127! free compressor by BipTunia Synths

THIS GOES TO 127! is a free compressor VST plugin developed by BipTunia Synths. Compatible OS(s): Windows.

“THIS GOES TO 127!” is a simple VST with no controls. (The knob is for show.).

And it only does one thing, and does that thing very well: It makes all MIDI notes max velocity (127), regardless of input velocity. This makes the volume on playback max.

It’s basically a dynamics compressor for MIDI.

This is useful for heavy music, and/or for using inexpensive MIDI keyboards with poor touch.

There are other ways of doing this, but none are mas simple as using THIS GOES TO 127.

Just unzip and drop it into your VST folder.

Then in your DAW, add our VST BEFORE the VST you want to affect (important).

The played notes will still show in the piano roll as various velocities, but will record, and play back, as max velocity (translates as max volume):

Leave THIS GOES TO 127! in the track for playback and render.

You can even set it up in your track template to be on every track.

Can also be used to “loudenize” previously recorded MIDI tracks.

Put together by Michael W. Dean of BipTunia Music and Soft Synths.

VST ID: 1127.