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How To Play Audio With The iPhone SDK » The App Business Blog

    http://iphoneincubator.com/blog/tutorial/how-to-play-audio-with-the-iphone-sdk
    Playing audio with the iPhone Software Development Kit (SDK) should be easy, right? After all this is an iPod – the music jukebox. After some fruitless experiments I decided to take a shortcut and use the audio support classes in the JigSaw sample application. Copy the entire AudioSupport directory from the JigSaw project.

Decibel metering from an iPhone audio unit | Politepix

    https://www.politepix.com/2010/06/18/decibel-metering-from-an-iphone-audio-unit/
    To meter the samples in the render callback requires six steps. Step 1: get an array of your samples that you can loop through. Each sample contains the amplitude. Step 2: for each sample, get its amplitude’s absolute value. Step 3: for each sample’s absolute value, run it through a simple low-pass filter,

iPhone SDK Development: Tapping into Apple's New …

    https://www.oreilly.com/pub/e/1274
    The AVFoundation framework was introduced in version 2.2 of the iPhone SDK, and provides functionality for playing and mixing sound files, metering, and basic audio control. If you're adding simple sounds to your application, this …

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