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Head-to-head · Audio Equalizer Software

Equalizer APO vs SotF

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Equalizer APO #1 in Audio Equalizer Software 9.3/10 Free plan Free plan✓ 3 of 4 features Visit Equalizer APO
SotF #3 in Audio Equalizer Software 9.1/10 Free plan Free plan✓ 2 of 4 features Visit SotF

Equalizer APO leads on 0 checks, SotF 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 scoreEqualizer APO · 9.3/10
  • Free planboth
  • Most featuresEqualizer APO · 3 of 4

Equalizer APO scores higher on our rubric for audio equalizer software: 9.3 against 9.1 out of 10; our editors rank them #1 and #3.

On desktop operating systems, SotF gives you Both where Equalizer APO offers Windows.

Equalizer APO is the better fit for windows users needing a powerful free system EQ. SotF is the better fit for cross-platform room and headphone EQ workflows.

  • Equalizer APO fits best

    Windows users needing a powerful free system EQ

  • SotF fits best

    Cross-platform room and headphone EQ workflows

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Side by side

Feature Equalizer APO 9.3/10 Visit ↗ SotF 9.1/10 Visit ↗
At a glance
Editor score 9.3 9.1
Ranking #1 in Audio Equalizer Software #3 in Audio Equalizer Software
Best for Windows users needing a powerful free system EQ Cross-platform room and headphone EQ workflows
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows Windows, macOS, Linux
Support Docs Community, Docs
Integrations 2 integrations 6 integrations
Built for Solo, Small business Solo, Small business
Features Equalizer APO 3/4 · SotF 2/4
System-wide control ✓ ✓
Per-app controls ✓ (best) Not checked yet
Parametric EQ ✓ ✓
Device profiles Not checked yet Not checked yet
Specs
Desktop operating systems Windows Both
EQ band count Not checked yet Not checked yet
Our review
Pros
  • System-wide parametric and graphic equalization
  • Virtually unlimited filters with very low latency
  • VST support plus Room EQ Wizard and Voicemeeter integrations
  • Free and open-source across Windows, macOS, and Linux
  • Measurement-based room EQ plus headphone target-curve optimization
  • Exports to CamillaDSP, Equalizer APO, EasyEffects, Wavelet, PipeWire, and Roon
Cons
  • Windows-only availability
  • Does not support ASIO or WASAPI exclusive mode
  • Advanced configuration may suit experienced desktop users better
  • System-wide routing through a HAL driver is limited to macOS
  • The broad processing toolkit may exceed the needs of simple EQ users
  • Surround upmixing is specified up to 9.1.6 Atmos
Our verdict

Equalizer APO is open-source audio equalizer software for Windows. It operates through the Windows Audio Processing Object infrastructure, applying system-wide processing to supported audio applications and selected devices. Its audience…

Read the review →

SotF is a free, open-source desktop application for music playback, equalization, room correction, headphone optimization, and audio processing. It supports FLAC, MP3, AAC, ALAC, Vorbis, and other common formats, while its Windows, macOS,…

Read the review →
  1. Equalizer APOAudio Equalizer Software 9.3Free plan
  2. SotFAudio Equalizer Software 9.1Free plan

Strengths and trade-offs

  • Equalizer APO — where it wins

    • System-wide parametric and graphic equalization
    • Virtually unlimited filters with very low latency
    • VST support plus Room EQ Wizard and Voicemeeter integrations

    Where it doesn't

    • Windows-only availability
    • Does not support ASIO or WASAPI exclusive mode
    • Advanced configuration may suit experienced desktop users better

  • SotF — where it wins

    • Free and open-source across Windows, macOS, and Linux
    • Measurement-based room EQ plus headphone target-curve optimization
    • Exports to CamillaDSP, Equalizer APO, EasyEffects, Wavelet, PipeWire, and Roon

    Where it doesn't

    • System-wide routing through a HAL driver is limited to macOS
    • The broad processing toolkit may exceed the needs of simple EQ users
    • Surround upmixing is specified up to 9.1.6 Atmos

More comparisons

All audio equalizer software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update