Youlean Loudness Meter

Youlean Loudness Meter free ppm-meter by Youlean

Youlean Loudness Meter is a free ppm meter VST, VST3, Audio Unit and AAX plugin developed by Youlean. Compatible OS(s): Windows 64b, macOS.

Youlean’s meter is a free professional loudness meter that help you prepare your productions for TV, radio, and other various streaming services. It allows you to enhance the perceived loudness of your mixes, while retaining dynamics and definition, as well as comply with strict loudness requirement for various industries and medias.

Go the extra mile with your mastering, get the most of your tracks and make it sound great on any platform and media !

Youlean Loudness meter is the winner of KVR developer challenge 2016 !

There are 2 versions:


  • True peak and loudness histogram graph.
  • Loudness distribution graph.
  • Automatic loudness overdub.
  • Film, TV and Gaming presets.
  • LU, INT, TP, LRA, PLR, DR readouts.
  • Resizing, scaling GUI.
  • Mono, Stereo, and 5.1 channel.
  • Low CPU consumption.


  • Everything the free version has plus:
  • Streaming presets.
  • Dynamics graph.
  • PDF, PNG or SVG export.
  • Saving custom presets.
  • Text scaling.
  • Dark and light theme for plugin and export.
  • Drag and drop analysis.
  • Lifetime free updates.

WaveShaper CM

WaveShaper CM free multi-fx | oscilloscope | waveshaper by Cableguys

WaveShaper CM is a free multi fx and oscilloscope and waveshaper VST, Audio Unit plugin developed by Cableguys. Compatible OS(s): Windows 64b, macOS.

Free with Computer Music magazine, WaveShaper CM is a plugin effect that lets you design your own distortion curves and analyse signals with a built-in multi-function oscilloscope.

This is an original plugin designed just for CM by Cableguys. Here’s what you get in WaveShaper CM:

  • Design your own waveshaping curves using soft, hard and sharp points.
  • Oscilloscope with Stereo, Left or Right view and Waveform zoom and freeze, syncable by tempo, frequency or MIDI note.
  • Online preset sharing system with tons of ready-to-go presets.

Get Computer Music magazine online and you can download WaveShaper CM right away. Find out more.

{See video at top of page}


VU2 free vu-meter by Starplugs

VU2 is a free vu meter VST plugin developed by Starplugs. Compatible OS(s): Windows.

VU2 is a 2 channel high precision meter. It can be used as Peak meter, Program Peak meter, VU meter or Power meter with integration times from 1 sample to 1 second and decay times from 1 sample to 10 seconds. The meter headroom can be adjusted in 0.1 dB steps from 0 to –20 dBfs. Each VU meter comes with an over-hold LED and features a second peak-hold needle. The VU2 also features a correlation meter.


  • Peak Meter.
  • Program Peak Meter.
  • VU Meter.
  • Power Meter.
  • Correlation meter.
  • Over LED.
  • Peak Needle.
  • PDF Manual.
Made with SynthEdit

VPS Scope

VPS Scope free spectrum-analyzer | scope-analyzer | correlation-meter by Vengeance Sound

VPS Scope is a free spectrum analyzer and scope analyzer and correlation meter VST, VST3, Audio Unit, AAX plugin developed by Vengeance Sound. Compatible OS(s): Windows 64b, macOS.

VPS Scope is an analyser plugin with scope, spectral and stereo analysis:

  • supports different VU metering modes.
  • synced & free running, zoomable realtime waveform.
  • fft analyzer (line, bar, band size configurable).
  • rotatable 3d spectral display.
  • stereo vector-scope, Correlation, M/S modes.
  • many options and configurations.
  • available in VST, VST3, AAX and AU format.

This plugin is free for all customers. This means you need to have at least 1 Vengeance license key on your dongle to use it. Which one does not matter.

{See video at top of page}

Vectorscope 2

Vectorscope 2 free vectorscope | correlation-meter by Audec

Vectorscope 2 is a free vectorscope and correlation meter VST3, Audio Unit plugin developed by Audec. Compatible OS(s): Windows 64b, macOS.


  • Vectorscope.
  • Correlation Meter (Right).
  • L/R Balance Meter (Bottom).
  • Resizable window.

Price: Free.

Track Meter

Track Meter free vu-meter | ppm-meter by rs-met

Track Meter is a free vu meter and ppm meter VST plugin developed by rs-met. Compatible OS(s): Windows.

Track Meter is a plugin to display the current level of a stereo input signal separately for the left, right, mid and side channels and also to display the cross-correlation between the two channels.

The Seeker

The Seeker free spectrum-analyzer by Himiltungl Labs

The Seeker is a free spectrum analyzer VST, VST3, Audio Unit plugin developed by Himiltungl Labs. Compatible OS(s): Windows 64b, macOS.

Analog-style Spectrum Analyzer

The Seeker brings you fast, dynamic spectrum analysis that will make your FFT-based analysers look like they’re frozen in time:

  • Up to insane 1/192-octave spectrum resolution.
  • 10 – 500 ms integration time to match different types of material.
  • Eigen SSE-optimized core for low CPU-usage.
  • Dual graph showing amplitude as well as dynamics simultaneously.
  • Resizeable, minimal user interface.

New features in v1.1.0:

  • Display graph axis values under cursor.
  • Hide logo*.
  • Hide settings*.
  • Set spectrum scale level to adjust for low or high signals*.

* saved in presets.

{See video at top of page}


  • Requires OpenGL hardware support.
  • Reportedly broken in Logic Pro X. Update: Please try v1.0.1 and see if it fixes the issue.

[Source code at github].

THD Meter

THD Meter free metering by MathAudio

THD Meter is a free metering VST, VST3, Audio Unit plugin developed by MathAudio. Compatible OS(s): Windows 64b, macOS.

MathAudio THD Meter plug-in:

  • Measures Total Harmonic Distortion (THD) in sound cards, speakers and headphones.
  • Applies matched filters for maximizing the signal-to-noise ratio (SNR) in the presence of additive stochastic noise.
  • Supports microphone calibration files.
  • Supports full range of sample rates from 44.056 kHz up to 384 kHz. All sample rates are supported without resampling to avoid any possible loss in accuracy.


SpectrumAnalyzer free spectrum-analyzer by SIR Audio Tools

SpectrumAnalyzer is a free spectrum analyzer VST, VST3, Audio Unit, AAX plugin developed by SIR Audio Tools. Compatible OS(s): Windows 64b, macOS.

SpectrumAnalyzer is a spectrum analyzer plugin that offers a lot of opportunities to display the spectral content of your audio material, which helps you create a better mix. SpectrumAnalyzer comes in two editions, a free and a full version.

SpectrumAnalyzer has a FFT (Fast-Fourier-Transform) and an analog-style (parallel band-pass IIR filter) engine, both of which can run simultaneously. So you can benefit from the more accurate time resolution of the band-pass filters and the better frequency resolution of the FFT at the same time. Check out the intelligent peak-detection, which automatically detects resonant frequency peaks in the signal. Use the snapshot function to easily save the current state of your analyzer, so you can compare the spectral profile of your current project with other songs. SpectrumAnalyzer also includes a VU-Meter (with peak and RMS measurement) and a Stereo Correlation Meter.

SpectrumAnalyzer features an auxiliary feature that makes it possible to send audio from one SpectrumAnalyzer instance into other instances. This is a quite powerful tool, because you can set up as much aux-sends as you want, and then you can easily switch between them as input source. For example, you have different subgroups and want to see the spectrum of all of them in one SpectrumAnalyzer instance: put a single SpectrumAnalyzer instance on every track and activate the aux-send. Now you can comfortably switch between these aux-channels in your master SpectrumAnalyzer instance. In the full version, you can open up to 4 slots in one plugin instance.

SpectrumAnalyzer has nearly endless adjustment possibilities. To name a few: FFT-Size & Window. Number of Bands/Filter-Steepness and Bandwidth (analog style bandpass analyzer). Time Resolution & Release speed. Optional Peak Hold and intelligent Peak Detection. Spectral RMS with adjustable integration. Mid and Side Signal detection. Adjustable Colors, two different spectral smoothing algorithms. Display Range and Slope/dB. Adjustable GUI size and scaling. Optional gradient and shadow effects.

Spectrum Analyzer

Spectrum Analyzer free spectrum-analyzer by SocaLabs

Spectrum Analyzer is a free spectrum analyzer VST, Audio Unit plugin developed by SocaLabs. Compatible OS(s): Windows, macOS.

  • Spectrum Analyzer.
  • Spectroscope.
  • Log scaling.