Modify recorded sound to various effects in Android?

I am going to make an application related to sound modulation, where I need to record sound and after recording sound I need to play it in different modulations or sound effects such as Reverse, Resampling, Pitchshifting, Robating when I press the play button. Now I have a code for recording sound, but I do not know how to modulate the sound of the recorder, as the above effects.

I am looking for the whole network but have not found any solution. How can I implement these effects?

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There are many apis that help accomplish this. For instance -

Open SLES. AudioTrack

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