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A rather crude, but functional, port of MP3Gain to Android. It does (did?) not compile with the normal ndk, the ndk library was buggy. Comment out the faulty lines and it will work. Please note that I have long since abandoned this project.
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Normalizes mp3 files; it makes them all sound equally loud, so if you have a
song that's too quiet this app can make it be louder. Currently, it picks files
via another app, so you will need to have a music player, such as
https://f-droid.org/packages/com.android.music installed, or perhaps some other suitable file picker.
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