Voxengo SPAN is a free real-time spectrum analyzer that has become a staple in studios worldwide. Known for its precision, flexibility, and lightweight design, it gives producers and engineers a clear visual reference of frequency balance during mixing and mastering.
Despite being free, SPAN rivals paid analyzers with its detailed metering, customizable views, and smooth performance — making it one of the most downloaded plugins for any DAW setup.
⭐⭐⭐⭐⭐ (10/10)
Interface & Workflow
SPAN offers a straightforward yet powerful interface. Its large spectrum display is responsive in real time, with options to adjust block size, range, slope, and metering modes.
The flexibility makes it easy to tailor the view to your workflow — whether you’re checking low-end balance, comparing reference tracks, or hunting down resonant peaks.
The workflow is seamless: just drop it on your master bus or individual tracks to get instant frequency feedback.
Beginners benefit from its default settings, while advanced users can dive into deep customization for detailed analysis.
Features
- Real-time FFT spectrum analyzer with adjustable block size
- Multiple display modes with scalable range and slope settings
- RMS, peak, and correlation metering for full mix analysis
- Mid/Side and multichannel spectrum options
- Preset manager and fully resizable interface
- Lightweight CPU usage — perfect for any project size
Price & Value
SPAN is completely free, which makes its value unbeatable.
While other analyzers with similar features can cost upwards of $50–$100, Voxengo provides this tool at no cost, making it a must-download for every producer and engineer.
Pros
- 100% free with professional-grade features
- Highly customizable spectrum display
- Clear, accurate analysis in real time
- Lightweight and stable in all DAWs
- Includes advanced metering (RMS, correlation, peak)
Cons
- Visual-only tool — doesn’t affect sound
- Can feel overwhelming for beginners with too many options
- UI is functional but less modern than premium analyzers
Verdict
Voxengo SPAN proves that some of the best studio tools don’t cost a thing. With its accurate real-time spectrum analysis, flexible customization, and rock-solid stability, it’s an essential utility plugin for both beginners learning frequency ranges and professionals double-checking their mixes.
Rating: 10/10 — A free, professional-grade spectrum analyzer that belongs in every producer’s plugin folder.
FAQ
What does SPAN do?
It provides a visual spectrum analysis of your audio in real time, helping you spot frequency imbalances and problem areas in your mix.
Is SPAN really free?
Yes — Voxengo offers SPAN completely free, with no restrictions.
Does SPAN work in all DAWs?
Yes — it’s available in VST, AU, and AAX formats, making it compatible with all major DAWs.
Can SPAN be used for mastering?
Absolutely. Its precision and customization options make it great for mastering chains as well as mixing.
Does SPAN use a lot of CPU?
No — it’s lightweight and efficient, designed to run smoothly even in large sessions.
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