1. Overview of Core Audio
Core Audio is the engine behind any sound played on a Mac or iPhone OS. Its procedural API is exposed in C, which makes it directly available in Objective-C and C++, and usable from any other language that can call C functions, such as Java with the Java Native Interface, or Ruby via RubyInline. From an audio standpoint, Core Audio is high level because it is highly agnostic. It abstracts away both the implementation details of the hardware and the details of individual audio formats.
To an application developer, Core Audio is suspiciously low level. If you’re coding in C, you’re doing something wrong, or so the saying goes. The problem is, very little sits above Core Audio. Audio turns out to be a difficult problem, ...
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