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tuner, metronome, and piano for Android
Branch: master
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tckmn move about into settings, removing options menu
i was planning to do this anyway, but this also fixes #13
Latest commit 79a8f57 May 26, 2019


Semitone - tuner, metronome, and piano for Android
Copyright (C) 2019  Andy Tockman <>

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
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 <>.


Official website:
Google Play download:
F-Droid download:


To compile, first run

 $ tools/
 $ tools/

The first command is a custom build script to build ffmpeg with only the
necessary features, and the second command moves the shared object files to the
place where CMake is configured to find them. Then, to build Semitone, run
either of the following commands:

 $ gradle buildDebug
 $ gradle buildRelease


This software uses:

 * libraries from the FFmpeg project, under the GPLv2 or later

 * Material Design icons and the Oboe library, both licensed by Google under
   the Apache 2.0

 * audio provided by the University of Iowa Musical Instrument Samples project
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