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iOS 5 Core Frameworks: Develop and Design: Working with graphics, location, iCloud, and more by Shawn Welch

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9. Core Audio

We’ll now transition away from data centric apps and work with frameworks that provide a rich multimedia experience. Previously, we covered the quartz technologies for enriching an app’s user interface and experience. Here we move to the more traditional time-based multimedia formats, audio and video. Core Audio, the starting point in this rich media discussion, is a collection of multiple frameworks in iOS designed to support both input and output of audio operations on an iOS device—ranging from playing a song from a user’s iPod Music Library to a simple sound effect in a game. You will discover that working with audio on iOS devices requires special attention given to system events like the iPod’s Now Playing item, incoming telephone ...

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