Sound Effects/Manipulation? [closed]

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I am creating an android app that basically records an applies an "Effect" on the audio track then plays it back. I got my app to record an play back but I am stuck an not sure where do go from here. I have been Googling for days now trying to find a open source audio library or some way to change the audio after I record it. I currently have it setup to play back using SoundPool an I't lets me spe开发者_运维问答ed up an slow down the audio. I would like to do things like change pitch an add echo etc. I will appreciate any responses because I am totally stumped right now.

Thanks Adam

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Have you checked into the Java Sound API? It looks like it can do some of what you want.