GPL-3.0-or-later

Licence and source

FluidEQ is free software that is sold as a built binary. That is legal, deliberate, and worth explaining rather than glossing over.

FluidEQ is free software under the GNU General Public License v3.0 or later.

Full source on GitHub FluidEQ source, v1.2.0 Equalizer APO 1.4.2 source

Buying FluidEQ pays for a build, not a licence. Nothing on this site or at checkout restricts what you may do with the software afterwards — the freedoms to use, study, modify and redistribute come with every copy and cannot be taken back by a term of sale.

This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the licence text for details.

Building it yourself

The alternative to paying, stated as a real option rather than a formality. It is the same application; what the paid build adds is that someone else has already done this, signed it, and will keep doing it.

What you need
Windows 10 or 11, Node.js 20 or newer with pnpm, and Visual Studio 2022 with the “Desktop development with C++” workload.
What you run
Clone the repository, pnpm install, then pnpm package — which writes an installer into release/build. Equalizer APO is fetched and bundled by that build exactly as it is for the paid one.
What differs
Your build is not code-signed, so Windows will warn about the publisher every time. Nothing else about it is different.

Attribution

FluidEQ is designed, written and maintained by Ivan Carmenates Garcia. It began as a fork of AQUA in 2023; roughly 10% of the source is still theirs, and the other 90% is new work. That foundation is credited here with thanks.

  • Built on AQUA, © 2023 AQUA Dev Team, used under the GPL. Not an official continuation and not endorsed by the AQUA maintainers.
  • AutoEq data © 2018–2022 Jaakko Pasanen, MIT licensed.
  • Equalizer APO is a separate project by Jonas Thedering, GPL-2.0-or-later. FluidEQ is not affiliated with or endorsed by it — please report FluidEQ bugs on FluidEQ's issue tracker, not his.
  • Not affiliated with or endorsed by Dolby Laboratories.

Questions What it does