See also: Ozone Imager V2 Is A FREE Stereo Widening VST Plugin By iZotope Thanks to its precise spatial image analysis algorithm, Vector is the perfect tool to use in tandem with stereo widening plugins like the Ozone Imager V2. 2CAudio recommends using Vector together with its Precedence 1.5 and PBJ System plugins to maintain mono.

  • This free vst plugin goes a long way to improve your audio by eliminating a lot of the background hiss in your mic source. Subtract mode is an advanced noise suppression filter. It works by reducing the dynamic range of your microphone or audio source to eliminate noisy parts of the signal effectively.
  • Best Free Synth VST Plugins Dexed by Digital Sub Urban Dexed is a Free multi platform and multi format frequency modulation Synth which is based on, or closely modeled to, the Yamaha DX7. You can download it here.

If you use Wavosaur for mastering / premastering, or signal analysis in a more general way, you need tools for audio analysis : spectrum analyzers, phase analyzers, sonogram.
Wavosaur comes with analyzers, you’ll find them in the ‘tools’ menu, along with oscilloscopes & statistics about the sound file (maximum sample peak, RMS power, average value.).

But you can also use VST plugins (for some people it can be more convenient).
We have searched deep deep inside deep deep down inside into the web, to find the best free VST plugins for audio analysis, here’s the selection:

1) Spectrum Analysis

1.1) Voxengo SPAN


This spectrum analyzer uses FFT to display the signal frequency in real time.
You can freeze the display, and use the mouse to shows dB values / Frequency value
Frequency is displayed in Hz and in musical note.
/drum-kit-vst-plugin-free.html. The Voxengo SPAN analyzer also displays statistics : RMS power, and it features a clipping detection.

More info and download @ http://www.voxengo.com/product/span/
It is worth mentioning these plugins too, freeware!

1.2) Mdsp SmartElectronix Fre(a)koscope

Very nice, with interesting options for the spectrum display : linear/logarithmic/semitones .
Adjustable size for the FFT buffer. Had sometimes display problem with Wavosaur.
More info and download @ http://mdsp.smartelectronix.com/freakoscope/

1.3) BlueCat FreqAnalyst

Like the previous VST effect, this one can show spectrum of left / right channel or both, has a “hold peak” feature that is interesting, when dealing with EQ level in your mix.
More info & download @ http://www.bluecataudio.com/Products/Product_FreqAnalyst/

1.4) Seven phase Spectrum Analyzer

This one is freely resizable inside the host application (works in Wavosaur)
More info and download @ http://sevenphases.wordpress.com/spectrum-analyzer/

1.5) MultiInspector free

Download @ http://www.vertexdsp.com/downloads.html#MultiInspectorFree

2) Sonogram

2.1) ag-works sonogram sg-1

This free plugin displays a scrolling sonogram for frequency analysis.
You have the choice for the sonogram colors, and many options to tweak the sonogram displays
This is the only sonogram VST we have found for free ! Fortunaly it’s very good.
More info & download @ http://ag-works.net/plugins.sg1.htm

3) Goniometer

3.1) Flux Stereo Tool

When you need to visualize your stereo position, and the repartition in the field, this plugin is very useful. You can check for phase errors in your mixes.
download @ https://www.fluxhome.com/download

3.2) Gonio3

download @ http://www.uk-music.de/index.php?page=downloads

3.3) HOFA 4U Goniometer & Korrelator

download @ http://hofa-plugins.de/pages/start_en/4u_en.php

If you think that we have forget some free VST analyzer plugin in this list, do not hesitate to comment !

Edit:

Ssl vst plugins. We just have found this pretty nice analyzer somewhere on our harddisk :

Free Stereo Image Vst

Dust Analyzer:

It provides three modes : spectrum / scope / phase , with “hold peak” option, freeze option, dB/Freq display with mouse, linear / logarithmic scale

more info & download @ KvR audio forum & http://www.signaldust.com/

Ozone Imager is a FREE stereo imaging plug-in for your DAW or NLE. Born from Ozone 8’s legendary Imaging technology, Ozone Imager can narrow or widen your stereo image with simple controls, stunning visuals, and incredible sound.

Download it today and turn narrow, dull audio into a full, impactful track.

Superior audio quality

Make an impact with Ozone’s legendary Imaging technology. Add depth and width to mono or narrow mixes in Stereoize Mode for a fuller, wider sound.

Real-time feedback & visualization

Receive immediate, intuitive feedback as you adjust settings to taste. An integrated Vectorscope and Correlation Meter give you precise visual feedback to help guide your mixing and mastering decisions.

Free Stereo Vst

System Requirements

Operating Systems:

Mac: OS X 10.8.5 (Pro Tools 10 only), OS X 10.9 – macOS Sierra (10.12)

Windows: 7, 8 & 10

Free Stereo Image Vst Free

Plug-in Formats:

Free Stereo Imager Vst

VST2, VST3, AudioUnit (Mac Only), AAX (Real-time & AudioSuite; 64-bit only), RTAS (Real-time & Audiosuite (DPM); 32-bit only)