Dusk Audio Spectrum Analyzer
Dusk Audio Spectrum Analyzer is a free plugin for real-time measurement of frequency spectrum, loudness, true peak, stereo correlation, and K-System headroom.
What Dusk Audio Spectrum Analyzer is
Dusk Audio Spectrum Analyzer is a free plugin for real-time measurement of 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 plus optional peak hold. Loudness readings cover EBU R128 Momentary, Short-term, Integrated, and Loudness Range measures. True peak detection follows ITU-R BS.1770-4 with 4x oversampling, and the correlation meter ranges 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 equals input regardless of settings. It requires a 64-bit DAW supporting VST3, LV2, or AU. Formats include 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+. Dusk Audio says its plugins are free and open source, with source code on GitHub.
Good
- Free and open source, with source code on GitHub
- Displays spectrum, loudness, true peak, and correlation
- Offers Stereo, Mono, Mid, and Side views
- Analyzer leaves the audio path unchanged
Watch out
- Requires a 64-bit DAW with VST3, LV2, or AU support
- Linux formats are VST3 and LV2 only
Who it suits
It suits hobbyists, students, musicians in the open-source community, and Linux audio users who need audio measurement in a compatible 64-bit DAW.
Verdict
This plugin provides several audio measurement views and leaves the signal path unchanged. Check its DAW format and operating system requirements before choosing it.
Plans and prices
From Dusk Audio Spectrum Analyzer's own pricing page, checked 5 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | No trials · no feature limitations · no nag screens · Free; optional support is available. |
The facts
Each one read from Dusk Audio Spectrum Analyzer's own pages, with the date it was checked.
What it does
- 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.checked 5 Oct 2026
- Channel modes
- The channel mode can display Stereo, Mono, Mid, or Side.checked 5 Oct 2026
- FFT display
- The FFT display offers 2048, 4096, and 8192 sample resolutions, adjustable smoothing and slope, and optional peak hold.checked 5 Oct 2026
- 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+.checked 5 Oct 2026
- Loudness metering
- It provides EBU R128 compliant Momentary, Short-term, Integrated, and Loudness Range readings.checked 5 Oct 2026
- Plugin formats
- The product page lists Linux VST3 and LV2, Windows VST3, and macOS VST3 and AU formats.checked 5 Oct 2026
- Purpose
- Spectrum Analyzer is a real-time measurement plugin for viewing frequency spectrum, loudness, true peak, stereo correlation, and K-System headroom.checked 5 Oct 2026
- 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.checked 5 Oct 2026
- Support
- Users can report bugs and suggest features through GitHub Issues; financial support is optional.checked 5 Oct 2026
- 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.checked 5 Oct 2026
- 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.checked 5 Oct 2026
Money
- Free and open source
- Dusk Audio says all its plugins are free and open source, with source code available on GitHub.checked 5 Oct 2026
The company
- Maker
- Dusk Audio describes itself as a solo endeavor; the opened About page does not state headquarters or a founding date.checked 5 Oct 2026
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