I am developing an app for the iPhone/iPad using Xcode and iOS 5. Can anyone suggest any third party libs to do this, or give me some direction as to how to natively do it?
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1Not an XCode question. XCode tags is for specific questions about the IDE. – Almo Mar 20 '12 at 14:03
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Hahaha! Ok, will remember for next time. :) – Almo Mar 20 '12 at 17:11
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You can use Bass
and Bass_fx
library for changing pitch/tempo in real time.
You can download this library from http://www.un4seen.com/.
You can use following function for Pitch and tempo setting
BASS_ChannelSlideAttribute(mainStream, BASS_ATTRIB_TEMPO_PITCH, 0.0, updatePeriod);
which is available in Bass
library.

Devang
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Try using this sdk http://www.izotope.com/tech/iZomobile/ it uses audioqueue bit complicated yet powerfull

Dushyant Singh
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