Objective C: AVFoundation Changing Pitch is it possible?

Question

Can AVFoundation Framework change the Pitch of the sound recorded? If it's possible, how to change the voice's pitch?

Answer 1

AFAIK AVFoundation does not support DSP effects such as pitch shift (but someone please prove me wrong...). However, iOS supports OpenAL, which gives you a lot more options. To change pitch, use

alSourcef(source, AL_PITCH, myPitch)