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Head-to-head · Audio Analysis Software

Voxengo SPAN vs Sonic Visualiser

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Voxengo SPAN #4 in Audio Analysis Software 8.8/10 Free plan Free plan✓ 2 of 3 features Visit Voxengo SPAN
Sonic Visualiser #7 in Audio Analysis Software 7.7/10 Free plan Free plan✓ 1 of 3 features Try Sonic Visualiser

Voxengo SPAN leads on 0 checks, Sonic Visualiser on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreVoxengo SPAN · 8.8/10
  • Free planboth
  • Most featuresVoxengo SPAN · 2 of 3

Voxengo SPAN scores higher on our rubric for audio analysis software: 8.8 against 7.7 out of 10; our editors rank them #4 and #7.

Voxengo SPAN is the better fit for free plug-in spectrum analysis. Sonic Visualiser is the better fit for free audio visualization and annotation.

  • Voxengo SPAN fits best

    Free plug-in spectrum analysis

  • Sonic Visualiser fits best

    Free audio visualization and annotation

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Side by side

Feature Voxengo SPAN 8.8/10 Visit ↗ Sonic Visualiser 7.7/10 Visit ↗
At a glance
Editor score 8.8 7.7
Ranking #4 in Audio Analysis Software #7 in Audio Analysis Software
Best for Free plug-in spectrum analysis Free audio visualization and annotation
Pricing model Free Free
Starting price Free Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows, macOS Windows, macOS, Linux
Built for Solo, Small business, Mid-market Solo, Small business, Mid-market
Features Voxengo SPAN 2/3 · Sonic Visualiser 1/3
Real-time analysis ✓ (best) Not checked yet
Offline file analysis Not checked yet ✓ (best)
Loudness standards ✓ (best) Not checked yet
Specs
Maximum channels Not checked yet Not checked yet
Plugin support Vst Not checked yet
Analysis views spectrum, loudness, level, RMS, true peak, clipping, correlation, mid/side waveform, spectrum, spectrogram
Our review
Pros
  • Real-time FFT, spectrum smoothing and configurable display modes
  • Stereo, mono, mid-side and multichannel analysis with channel routing
  • EBU R128, K-system, true-peak, clipping and correlation metering
  • Waveform, spectrum, and spectrogram views for audio recordings
  • Annotations support points, segments, values, curves, and aligned layers
  • Feature-extraction plugins support beat tracking and pitch detection
Cons
  • Requires a compatible audio host rather than operating as a standalone tool
  • Analysis-focused feature set does not include audio editing functions
  • Available as a single Free plan without tiered workflow options
  • Designed for offline file analysis rather than real-time measurement
  • Its focus is studying music audio recordings, not broad production workflows
  • Desktop availability is limited to Windows, macOS, and Linux
Our verdict

Voxengo SPAN is a free real-time FFT audio frequency spectrum analyzer plug-in for music and audio production applications. It is designed for producers, engineers and audio professionals who need detailed visual analysis inside a…

Read the review →

Sonic Visualiser is a free, open-source desktop application for studying music audio recordings. It suits musicologists, archivists, signal-processing researchers, and other users who need detailed visual analysis of audio files. Available…

Read the review →
  1. Voxengo SPANAudio Analysis Software 8.8Free plan
  2. Sonic VisualiserAudio Analysis Software 7.7Free plan

Strengths and trade-offs

  • Voxengo SPAN — where it wins

    • Real-time FFT, spectrum smoothing and configurable display modes
    • Stereo, mono, mid-side and multichannel analysis with channel routing
    • EBU R128, K-system, true-peak, clipping and correlation metering

    Where it doesn't

    • Requires a compatible audio host rather than operating as a standalone tool
    • Analysis-focused feature set does not include audio editing functions
    • Available as a single Free plan without tiered workflow options

  • Sonic Visualiser — where it wins

    • Waveform, spectrum, and spectrogram views for audio recordings
    • Annotations support points, segments, values, curves, and aligned layers
    • Feature-extraction plugins support beat tracking and pitch detection

    Where it doesn't

    • Designed for offline file analysis rather than real-time measurement
    • Its focus is studying music audio recordings, not broad production workflows
    • Desktop availability is limited to Windows, macOS, and Linux

More comparisons

All audio analysis software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update