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Playing Audio Files with QTKit - meandmark.com
http://www.meandmark.com/qtkitaudiopart1.html
With QTKit you can use the same set of code to play any audio file whose format QuickTime supports. Apple introduced QTKit in Mac OS X 10.4. If you want to support earlier versions of Mac OS X, you must either use QuickTime’s C API, which I covered in a previous article , or use the NSMovie class.
QTKit Capture - Apple Inc.
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/QTKitApplicationProgrammingGuide/UsingQTKit/UsingQTKit.html
The QTKit capture API is optimized to provide capturing real-time media from devices such as iSight cameras, camcorders and tape decks, microphones and audio interfaces. The captured media can then be outputted to QuickTime movies, audio and video previews, as well as raw decompressed frames for further processing.
Adopting QuickTime X for Playback
https://developers.apple.com/library/archive/documentation/Cocoa/Conceptual/QTKitApplicationProgrammingGuide/QuickTimeX/QuickTimeX.html
For purposes of media playback, QTKit provides essentially one of two paths, either directly through QuickTime X or through QuickTime 7, as shown in Figure 3-1. These paths are transparent to your application, however, unless you choose to opt into QuickTime X. Figure 3-1 QTKit media services provided through QuickTime X and QuickTime 7
Now you know Qtkit Audio Playback
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