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I am creating one application which requires recording voice and then funny voice will play.

Is there any library to use this work function better?

HostileFork says dont trust SE
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user1414154
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1 Answers1

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The SpeakHere sample application provided from the SDK site has a working example of how to use the microphone to record the voice.

Now how to play funny voice.

For that there are no built-in iOS APIs that will do independent time-pitch modification.

There is open source code that implements time-pitch stretching in Audacity, but I don't know whether this code has been ported to iOS. Same with SoundTouch.

There is a Time-Pitch Stretch Tutorial on the DSP Dimensions site.

Some more blogs on it

  1. http://purplelilgirl.tumblr.com/post/9377269385/making-that-talking-app
  2. http://maniacdev.com/2011/08/tutorials-how-to-change-pitch-instantenously-without-changing-tempo-like-the-talking-tom-app/
  3. http://dirac.dspdimension.com/Dirac3_Technology_Home_Page/Dirac3_Technology.html
Mayur Birari
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  • Thanks Dear it is helpful for me to develop an application. Thanks again. – user1414154 Nov 22 '12 at 06:57
  • +1 for good pointers, but I'll point out that pitch shifting isn't the only way to make a voice funny. There's roboticizing, echoing, and all manner of other DSP techniques. If one wants to experiment and develop a method, then tools like [Max](http://en.wikipedia.org/wiki/Max_(software) or [Reaktor](http://en.wikipedia.org/wiki/Reaktor) can be useful. But they do not have a way to export the machines you build directly for use in iPhone codebases, so you'd have to re-engineer the processing chain you decide on. – HostileFork says dont trust SE Nov 22 '12 at 07:03