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SPECIFICTION
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Dusk Audio Spectrum Analyzer

duskaudio.com

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Spec score 8.0 #15 of 43 in Audio Analysis Software

What it is

Dusk Audio Spectrum Analyzer is a free, real-time plugin for measuring frequency spectrum, loudness, true peak, stereo correlation, and K-System headroom. Its FFT display offers 2048, 4096, and 8192 sample resolutions, with adjustable smoothing and slope and an optional peak hold. Loudness readings cover EBU R128 Momentary, Short-term, Integrated, and Loudness Range measurements. True peak detection follows ITU-R BS.1770-4 with 4x oversampling; the stereo correlation meter runs from -1 to +1. Channel views include Stereo, Mono, Mid, and Side. The manual describes it as a pure analyzer that leaves the audio path unchanged, so output matches input regardless of settings. It requires a 64-bit DAW supporting VST3, LV2, or AU. Listed formats are Linux VST3 and LV2, Windows VST3, and macOS VST3 and AU. Minimum systems are Debian 12+, Ubuntu 22.04+, or Fedora 36+ on Linux, Windows 10+, and macOS 10.13+. The plugins are free and open source, with source code on GitHub. The listed price is free.

Spec sheet

Purpose
Spectrum Analyzer is a real-time measurement plugin for viewing frequency spectrum, loudness, true peak, stereo correlation, and K-System headroom.Read 5 Oct 2026 · duskaudio.com
Support
Users can report bugs and suggest features through GitHub Issues; financial support is optional.Read 5 Oct 2026 · duskaudio.com
Maker
Dusk Audio describes itself as a solo endeavor; the opened About page does not state headquarters or a founding date.Read 5 Oct 2026 · duskaudio.com
Audio path
The manual says the plugin is a pure analyzer that does not write to the audio path, so its output equals its input regardless of settings.Read 5 Oct 2026 · duskaudio.com
Channel modes
The channel mode can display Stereo, Mono, Mid, or Side.Read 5 Oct 2026 · duskaudio.com
FFT display
The FFT display offers 2048, 4096, and 8192 sample resolutions, adjustable smoothing and slope, and optional peak hold.Read 5 Oct 2026 · duskaudio.com
Free and open source
Dusk Audio says all its plugins are free and open source, with source code available on GitHub.Read 5 Oct 2026 · duskaudio.com
Host requirements
It requires a 64-bit DAW supporting VST3, LV2, or AU; the listed minimums are Debian 12+, Ubuntu 22.04+, or Fedora 36+ on Linux, Windows 10+, or macOS 10.13+.Read 5 Oct 2026 · duskaudio.com
Loudness metering
It provides EBU R128 compliant Momentary, Short-term, Integrated, and Loudness Range readings.Read 5 Oct 2026 · duskaudio.com
Plugin formats
The product page lists Linux VST3 and LV2, Windows VST3, and macOS VST3 and AU formats.Read 5 Oct 2026 · duskaudio.com
Security and compliance
The product page states EBU R128 and ITU-R BS.1770-4 metering compliance; it does not state security certifications or a privacy policy.Read 5 Oct 2026 · duskaudio.com
True peak and correlation
True peak detection is ITU-R BS.1770-4 compliant with 4x oversampling, and a stereo correlation meter ranges from -1 to +1.Read 5 Oct 2026 · duskaudio.com
Who it is for
Dusk Audio says it builds for everyone and identifies hobbyists, students, musicians in the open-source community, and Linux audio users as audiences it aims to serve.Read 5 Oct 2026 · duskaudio.com

Plans and prices

Free Free Free; optional support is available. No trials · no feature limitations · no nag screens Read 5 Oct 2026 · duskaudio.com

Every Dusk Audio Spectrum Analyzer plan and price →

Strong points and limits

Strong points

  • Free, open-source plugin with source code on GitHub
  • Measures spectrum, loudness, true peak, and stereo correlation
  • Includes four channel display modes
  • Does not alter the audio path

Limits

  • Requires a 64-bit DAW
  • Linux support requires Debian 12+, Ubuntu 22.04+, or Fedora 36+
  • No free trial is listed

Who it suits

It suits audio users who need real-time spectrum and loudness measurements in a compatible 64-bit DAW. Dusk Audio names hobbyists, students, open-source community musicians, and Linux audio users among its intended audiences.

Verdict

The analyzer combines several audio measurement views with configurable FFT display options and compliant loudness and true-peak readings. Check its DAW format and operating-system requirements before choosing it.

Where Specifiction places it

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