Real-time Pitch Shifting on the iPhone

iphone audio core-audio pitch pitch-tracking
Leachy Peachy picture Leachy Peachy · Jul 8, 2009 · Viewed 24.6k times · Source

I have a children's iPhone application that I am writing and I need to be able to shift the pitch of a sound sample using Core Audio. Does anyone have any example code I could look at where this is done. There are many music and game apps in the app store that do this so I know I am not the first one. However, I cannot find any examples of it being done.

Answer

Aran Mulholland picture Aran Mulholland · Dec 15, 2009

you can use dirac-2 from dsp dimension for pitch shifting on the iphone. quote: -

"DIRAC2 is available as both a commercial object library offering unlimited sample rates and phase locked multichannel support and as a free single channel, 44.1/48kHz LE version."

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