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hello i m new in iphone i just want to know how and which libraries can be used to change the pitch of the recorded audio in iphone.Now i m using dirac library to do this if there is any other way to implement this then please help me,...thanks in advance:)

Sishu
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  • hello i m new in iphone i just want to know how and which libraries can be used to change the pitch of the recorded audio oin iphone. – Sishu Apr 25 '12 at 10:24
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    Then why didn't you ask that? You posted a run on sentence, no question and no context. – Oded Apr 25 '12 at 10:28
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    Also - [Stack Overflow is not your personal research assistant](http://meta.stackexchange.com/a/128553/140505) – Oded Apr 25 '12 at 10:29
  • sorry! i m new here.will try to keep all these things in mind .if possible please answer my question. – Sishu Apr 25 '12 at 10:33

2 Answers2

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check out this library: http://www.surina.net/soundtouch/

or this question: How to set pitch of an audio file or recorded audio file in iphone sdk?

also note: there is a search function here, AND on google :-) i just entered

objective-c change pitch of audio and those where the two topmost hits.

Community
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Sebastian Flückiger
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  • i have downloaded this library but it contains only files not any sample code about using it properly ,plz tell me how to use it. – Sishu Apr 25 '12 at 11:02
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    @aloksinha: it looks like you didn't even bother to read trough the text. [Here](http://www.surina.net/article/time-and-pitch-scaling.html) are also links to sample code. – Rok Jarc Apr 25 '12 at 14:39
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    @rokjarc thanks for your answer as i m new here.but i m quite sure i will learn quickly by the help of guys like u ...thanks a lot . – Sishu Apr 26 '12 at 04:20
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As Sebastian said, use search. People will be unwilling to help if it seems like you have asked a question without doing much research yourself thus wanting the community to provide a complete solution.

That being said I actually had the same problem a while back, check out my question, it should provide you with enough general information in how to implement the particular solution I chose to take so that you can roll your own implementation.

Basically I recorded the audio with AVRecorder and changed the pitch, etc. with openAL. Best of luck.

[EDIT]

I just remembered this link. They are some tutorials for what you wish to achieve, I just wish I found them before I started doing my own implementation as it would have saved me a good bit of time. Best of luck!

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bennythemink
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  • Thanks i have able to change the pitch of the recorded sound by the help of dirac library.But the output sound is very noisy .if possible plz hint me to remove this. – Sishu Apr 26 '12 at 04:27
  • I do not know that library sorry alok. maybe play around with the sampling rate to remove the noise. – bennythemink Apr 26 '12 at 07:36
  • changing of the sampling rate does not makes any visible difference in my app.! – Sishu Apr 26 '12 at 10:44
  • Hey alok I updated my answer with a link to some tutorials. Hopefully that may help you achieve what you need. Best of luck! – bennythemink Apr 27 '12 at 03:06
  • i have gone through the links and really find myself in a condition to get started thanks a lot ....really useful. – Sishu May 01 '12 at 04:17