Voice morphing iphone sdk

I want to do voice morphing for the recorded voice (i.e) I want to change the voice that cat s开发者_StackOverflow社区peaks,Can you please suggest me a way or an algorithm to do so.

Thanks in advance

Look into OpenAL, an audio framework already present in ios. It has the ability to record and play back - morphing the sound via pitch and virtual 3d location. Mainly, you'd probably want the pitch morph function to make a cat.