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About us


Christoph Wick and Haye Hinrichsen
University of Würzburg, Germany.


Responsible for the content of this website:

Prof. Dr. Haye Hinrichsenwuerzburg

Dept. of Theoretical Physics III
Faculty for Physics and Astronomy
University of Würzburg
97074 Würzburg, Germany
Tel. +49-931-31-84908
Email: info at

Privacy Policy:

The software application Entropy Piano Tuner (“Application”) uses the built-in microphone of the installed device to record the the spectra of each key of your piano.

Any information collected through the microphone is used only for calculating an optimal tuning in the Application. The Application will never send the data outside the device, or use it for collecting personal identifiable information.

You can set the device to deny the access to the built-in microphone from the Application. In that case, the Application cannot detect the spectra of your piano and therefore not compute a tuning. If you wish to use the Application, allow the access to the microphone.

This Privacy Policy is subject to change in accordance with the Application update.By using the Application, you are consenting to the Privacy Policy as set forth now and as amended by us.


The software offered for download on this site is published under the GNU-GPL3 license, which allows you to use it free of charge for private and commercial purposes. The source code can be downloaded from here.

The Entropy-Piano-Tuner contains the following open-source components from third parties:

Qt, Qwt, FFTW3, RtMidi, TinyXML-2, PgMidi, USB-Midi-Driver

The software uses a special tuning method that was previously published here.

Mac, Macintosh, Apple, Apple Macintosh, the Macintosh logo, the Apple logo, and the Apple Macintosh operating system interface are trademarks or registered trademarks of Apple, Inc. Google, the Google logo, and the Google interface are trademarks or registered trademarks of Google, Inc. Microsoft, Microsoft Windows, Microsoft Windows Vista, the Microsoft logo, the Microsoft Windows logo, the Microsoft Windows Vista logo, and the Microsoft Windows operating system interfaces are trademarks or registered trademarks of Microsoft, Inc.