To use this assembly SoX for Android: replace in the file /jni/Application.mk DIRECTORY_TO_OBJ variable to the full path to your folder obj and then run the ndk-build.
To test the SoX can compile this program and start it on your Android device. The standard program will play the file / sdcard / testwww.flac, in the event that this 16-bit file.
Attention! This program is unstable, so I can not guarantee the music on your device.
If you want to do something to help this project - please contact us by email: wkyborgw@gmail.com
Enjoy!

WARNING:
The project compiles fine on Linux, 
BUT when compiling on Windows via Cygwin can be a problem.