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Flexible general-purpose audio compressor with a touch of citrus



I wrote this compressor to learn all I could about audio compression. It took me several months to gather all the specs and papers I needed and convert them into code.

Squeezer is different from all the compressors I know: its knobs are stepped to fine-tuned preset values, but can be changed to continuous values by clicking a small orange light located next to them. This allows you to find nice settings fast while not preventing optimisation of settings.

Squeezer adapts easily to many tastes and use cases:

  • feed-forward & feed-back design
  • linear, logarithmic & smooth release stage
  • optical & FET detectors
  • peak & RMS sensing
  • hard, medium & soft knee
  • flexible side-chain & parallel compression

Squeezer has given me a deep insight into compression. But above that, it has quickly become my go-to generic compressor!

I hope that you have as much fun with this compressor as I had when I coded it!


For documentation and further information, please see the manual and the directory doc.

Code of conduct

Please read the code of conduct before asking for help, filing bug reports or contributing to this project. Thanks!


Copyright (c) 2013-2020 Martin Zuther

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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 GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

Thank you for using free software!

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