How can I apply an audio effect to a recorded audio?

Question

Hi, I want to record a sample from the microphone, then I want to play the recorded file maximizing the volume and apply some audio effect, like modifing sample rate or addind an echo.

Waht is the best way? is there an example?

Answer 1

Waht is the best way?

There is nothing built into Android for this sort of audio file modifications. You will need to either find a Java library for it or a C/C++ library and apply it using the NDK.