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ALAC supports up to 8 channels of audio at 16, 20, 24 and 32 bit depth with a maximum sample rate of 384 kHz. ALAC data is frequently stored within an MP4 container with the filename extension.m4a. This extension is also used by Apple for lossy AAC audio data in an MP4 container (same container, different audio encoding).
The 'Music' category is merely a guideline on commercialized uses of a particular format, not a technical assessment of its capabilities. For example, MP3 and AAC dominate the personal audio market in terms of market share, though many other formats are comparably well suited to fill this role from a purely technical standpoint.
As of January 6, 2009, nearly all music on the USA regioned iTunes Store became DRM-free, with the remainder becoming DRM-free by the end of March 2009. [ 65 ] iTunes offers a "Variable Bit Rate" encoding option which encodes AAC tracks in the Constrained Variable Bitrate scheme (a less strict variant of ABR encoding); the underlying QuickTime ...
Its first public appearance was in 2006, when Apple introduced the iTunes Store. The M4V format has been an important part of the Apple ecosystem ever since, and is often used to distribute movies, series, and other video content on the iTunes Store. Unauthorized reproduction of M4V files may be prevented using Apple's FairPlay copy protection.
iTunes is a media player, media library, and mobile device management utility developed by Apple.It is used to purchase, play, download and organize digital multimedia on personal computers running the macOS and Windows operating systems, and can be used to rip songs from CDs as well as playing content from dynamic, smart playlists.
Apple released QuickTime 6.2 exclusively for Mac OS X on April 29, 2003, to provide support for iTunes 4, which allowed AAC encoding for songs in the iTunes library. [60] (iTunes was not available for Windows until October 2003.) On June 3, 2003, Apple released QuickTime 6.3, delivering the following: [61]
Screenshot of an iOS 17 home screen, displaying various built-in apps. Apple Inc. develops many apps for iOS that come bundled by default or installed through system updates. . Several of the default apps found on iOS have counterparts on Apple's other operating systems such as macOS, iPadOS, watchOS, and tvOS, which are often modified versions of or similar to the iOS applicati
The GDI system in Windows is pixel-based and thus not resolution-independent. To scale up the UI, Microsoft Windows has supported specifying a custom DPI from the Control Panel since Windows 95. [4] (In Windows 3.1, the DPI setting is tied to the screen resolution, depending on the driver information file.) When a custom system DPI is specified ...