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What Is Core Audio? - Apple Developer
https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/WhatisCoreAudio/WhatisCoreAudio.html
You find Core Audio application-level services in the Audio Toolbox and Audio Unit frameworks. Use Audio Queue Services to record, play back, pause, loop, and synchronize audio. Use Audio File, Converter, and Codec Services to read and write from disk and to perform audio data format transformations. In OS X you can also create custom codecs.
Core Audio - Apple Developer
https://developer.apple.com/documentation/coreaudio
Build a virtual audio device by creating a custom driver plug-in. Building an Audio Server Plug-in and Driver Extension Create a plug-in and driver extension to support an audio device in macOS.
Apple - Lists.apple.com - Welcome to the Apple Listserv
Welcome to the Apple Listserv - lists.apple.com By joining these lists, you can share experiences, questions, and comments with others. While Apple employees monitor the lists, Apple doesn't guarantee that questions will be answered. The mailing lists are not a replacement for formal support or bug reporting procedures.
Core Audio Essentials - Apple Developer
https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/CoreAudioEssentials/CoreAudioEssentials.html
In Core Audio, you use two universal data types to represent any audio data format. These types are the data structures AudioStreamBasicDescription ( Listing 2-4) and AudioStreamPacketDescription ( Listing 2-5 ), both declared in the CoreAudioTypes.h header file and described in Core Audio Data Types Reference.
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