Standard [CURRENT]
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The Audio Device Class Definition applies to all devices or functions embedded in composite devices. All audio signals inside an audio function start at an Input Terminal, pass through some Units, and leave the function through an Output Terminal. Units can manipulate the signal in various ways. Terminals represent the connections of the function to the outside world. There are no restrictions on the scope of application of the document. Typical examples of applications are personal music players and USB-enabled audio playback devices.