European Committee for Electrotechnical Standardization（CENELEC）
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EN IEC 62680-1-5:2019
Scope
IEC 62680-1-5:2019 describes the minimum capabilities and characteristics an audio device shall support to comply with the USB. This document also provides recommendations for optional features. The Audio Device Class Definition applies to all devices or functions embedded in composite devices that are used to manipulate audio, voice, and sound-related functionality. This includes both audio data (analog and digital) and the functionality that is used to directly control the audio environment, such as Volume and Tone Control. The Audio Device Class does not include functionality to operate transport mechanisms that are related to the reproduction of audio data, such as tape transport mechanisms or CD-ROM drive control.
EN IEC 62680-1-5:2019 history
2019EN IEC 62680-1-5:2019 Universal serial bus interfaces for data and power - Part 1-5: Common components - USB Audio 3.0 device class definition