Best free Frequency, Loudness, & Audio VST Plugins of 2023

In this article, we will tell you about our favorite free Frequency, Loudness, & Audio VST Plugins of 2023. There are tons of free analyzer VSTs available in the market.

We have selected some of the best free VST plugins for you that are actually useful and can bring something new to your music production process.

Best Free Audio Analyzer VST of 2023

Youlean Loudness Meter

Youlean Loudness meter is a free audio analyzer plugin. It has free as well as paid options. This plugin is very useful for tracking various parameters of the audio including loudness, dynamic range, loudness range, dynamic range, true peak, and more. Furthermore, this is one of the very few free VSTs that provide a 5.1 analyzer.

Best free Frequency, Loudness, & Audio VST Plugins of 2023

This is arguably the best free audio analyzer available in the market.

Car Test by Rocket Powered Sound

We all have an audio analyzer in our DAW. It can provide us with crucial information about our sound. However, it does not gives us a unique listening experience. Car Test by Rocket Powered Sound AKA RPS is one of a kind plugin that can give you the experience of a real car stereo system.

Best Free audio analyzer VST 2023

That way, you can actually analyze how will your audio sounds in the sound system of a car. This gives an opportunity to observe the sound from a new perspective in the DAW.

Span by Voxengo

Spectrum analysis is a crucial part of the mixing and mastering process. Although there are many free analog and digital frequency analyzers in the market, Span is way above them all. Span is an FFT(Fast Fourier Transform) based analyzer with minimum latency and a high-quality visual spectrum analyzer.

The plugin includes a Stereo, Mid-Side, and Surround analyzer. Apart from this, there is a Peak and RMS meter included in the plugin. Span is available in VST, AU, and AAX formats for Windows and macOS.

MAnalyzer by Melda Production

Best free audio analyzer VST 2023MAnalyzer is an amazing FFT-based audio analyzer. This plugin is a great alternative to Span. The main features of this plugin includes -

  1. 1/3 octave bars or FFT curve.
  2. Averaging for real frequency content over time.
  3. Smoothing spreads energy between ranges of frequencies for perfect optical recognition.
  4. Magnitude normalization for better optical comparison.
  5. Freeze mode.
  6. Copy/paste to the clipboard to compare in another analyzer window.
  7. FFT sizes from 1024 to 16384.
  8. Overlapping and adjustable windows for maximal precision.
  9. Global preset management.

CqtAnalyzer by Chroma DSP

Best Free spectrum analyzer VST 2023CqtAnalyzer is a free spectrum analyzer VST plugin. This is an open-source VST. The best advantage of this VST is the low CPU requirement. Thus, if you have the low processing power, this frequency analyzer is best for you. This VST is based on the constant Q transform and covers 48 bins/partials per octave.


Another great analyzer from Melda Production. This plugin is great for music producers, post-producers, & mixing and mastering engineers likewise. This VST is compatible with ITU-R BS.1770-1 and EBU 3341 standards. The plugin can find, peak, momentary, short-term, and integrated loudness. Furthermore, it supports EBU+9, EBU+18, and EBU+27 scales.

Best Free Audio analyzer VST 2023

MLoudnessAnalyzer supports up to 8 channels as well as mid-side analysis. It is a light on processor and has an easy-to-understand User interface.

midiChordAnalyzer by Insert Piz Here

midiChordAnalyzer is a unique analyzer VST that helps users guess midi chord names based on the midi input. This is a great utility plugin for producers and artists who are learning music theory or do not have in-depth knowledge of it.

Best free Audio Analyzer VST 2023

The VST is very easy to use, simply feed the midi notes to the plugin and it will show you the text format of the chord. You can also paste the midi notes or chord names in the plugin.

Spectrum Analyzer by Seven Phases

This VST is different than all spectrum analyzers we have discussed so far. While most modern frequency analyzers use FFT as the main algorithm, Seven Phases' Spectrum Analyzer uses the old filter-bank algorithms. This gives users the experience of the classic frequency analyzer hardware. The plugin can show a simultaneous peak, peak-hold, and average (RMS) values.

Best free frequency analyzer VST For windows and macOS 2023

This analyzer supports all sample rates, has unrestricted resizability, and can show 30, 40, or 60 bands respectively. You can also customize colors in the plugin.

EQ Curve Analyzer

Best Free audio analyzer VSTs 2023EQ Curve analyzer is a free alternative to Plugin Doctor. This VST can help you analyze the EQ curves and their respective phase changes. This plugin can help you analyze the frequency and phase response of any VST or Hardware unit. To analyze any plugin you will need 2 instances of EQ Curve Analyzers, each before and after the effect, you want to analyze. You can also set the plugin latency.

Final Thoughts

Thanks for reading! Make sure to check our free Car Test VST plugin that helps you translate your mixdown in a car stereo system. Also, don't forget to download out free Vital VST presets.