Android and the NDK/librarys

I have now admitted defeat that you cannot use/build a good audio pitch function without using the NDK. Now my question is does anyone know of any good pitch changing code开发者_高级运维 either in a library or some source code for the NDK?

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You could have a look at the MicDroid app that does auto-tune, sources available on GitHub: https://github.com/intervigilium/MicDroid

some more info here:

http://forum.xda-developers.com/showthread.php?t=721388