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    • changing sound frequency

    Discussion in 'Public Game Developers Forum' started by wootbean, Nov 3, 2009.

    1. wootbean

      wootbean Well-Known Member

      Feb 8, 2009
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      the next whiskey bar
      #1 wootbean, Nov 3, 2009
      is there any way to change the pitch of a sound as it's playing?
       
    2. Uptown Arts

      Uptown Arts Well-Known Member

      Sep 12, 2009
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      Miami, FL
      #2 Uptown Arts, Nov 4, 2009
      In OpenAL, there's a source attribute called AL_PITCH that you can modify.
       
    3. wootbean

      wootbean Well-Known Member

      Feb 8, 2009
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      the next whiskey bar
      #3 wootbean, Nov 4, 2009
      I'm using an AVAudioPlayer to play the sound, would you mind elaborating on how I can use AL_PITCH to change the pitch? :eek:
       
    4. Steve Oldmeadow

      Steve Oldmeadow Member

      May 22, 2009
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      #4 Steve Oldmeadow, Nov 4, 2009
      You can't change the pitch with AVAudioPlayer, you need to use OpenAL which is a completely different audio API.
       
    5. wootbean

      wootbean Well-Known Member

      Feb 8, 2009
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      the next whiskey bar
      #5 wootbean, Nov 4, 2009
      hmm I see
      I'll go do more research on OpenAL then.
       
    6. Flickitty

      Flickitty Well-Known Member

      Oct 14, 2009
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      iPhone Dev
      #6 Flickitty, Nov 4, 2009
      OpenAL is pretty standard and widely used. You can find a lot of information about it on the internet. I would suggest using that library if it suits you.

      We tried FMOD in the past, but it seemed to be much more of a resource hog and we didn't like the licensing.
       

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