Equalizer APO
v1.4.2Open source
System-wide equaliser for every sound your PC plays. By Jonas Thedering
- Windows
By the ToolsBharat teamLink checked 30 Oct 2026How we check
Quick answer
Equalizer APO is open source software for Windows from Jonas Thedering. System-wide equaliser for every sound your PC plays. Download it only from sourceforge.net. The latest version we track is 1.4.2. ToolsBharat links straight to the publisher's own download page, with no bundled offers.
- Latest version:
- 1.4.2
- Publisher:
- Jonas Thedering
- Official site:
- equalizerapo.sourceforge.io
- Licence:
- Open source — GPL-2.0
- Requirements:
- Windows Vista or later (tested on 7–11)
Our verdict
Equalizer APO applies EQ to all Windows audio — music, games, calls — with almost no CPU cost. It is popular for correcting headphones using published EQ presets. Configuration is text-based by default, so many people pair it with a graphical front end.
Key features
- Unlimited filters, system-wide
- Per-device configuration
- Bundled Configuration Editor
Free online tools for this
On our sister site MuftTools.in, made by DVM Techno, the team behind ToolsBharat. They run in your browser, with nothing to install.
Pros
- Pro: Very low latency and CPU use
- Pro: Free and open source
Cons
- Con: Does not affect apps using ASIO or WASAPI exclusive mode
- Con: Setup is technical for beginners
What's new in 1.4.2
See what changed in 1.4.2 in the official release notes
Version history
Version 1.4.2Latest
date not stated · 12.0 MB- SHA-256
- The developer does not publish one
- Source
- Release notes
Requirements
- OS
- Windows Vista or later (tested on 7–11)
- Architecture
- 64-bit, 32-bit, ARM64 (Windows 10/11)
Licence
- Type
- Open source
- Licence
- GPL-2.0
- Publisher
- equalizerapo.sourceforge.io
Where these facts come from
Checked 30 Oct 2026
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