In the case of composite equipment
This is the US National Adoption of Assistive listening devices and systems for active assisted living - Part 1: General IEC 63087-1:2021
US National Adoption of Guideline for synchronization of audio and video - Part 1-1: Measurement methods for synchronization of audio and video equipment and systems - General IEC TS 62312-1-1: 2018 (ANSI/CTA-6032)
US National Adoption of Digital Audio Interface — Part 1: General IEC 60958-1:2021 (ANSI/CTA-6006)
This is the US National Adoption of Multimedia systems and equipment - Multimedia e-publishing and e-books - Interchange format for e-dictionaries IEC 62605:2021
Audio, Video and Multimedia Systems - Multichannel Audio Channel Assignment Digital Health and Fitness In the case of compositeUS National Adoption of Audio, video and multimedia systems General channel assignment of multichannel audio IEC 62574: 2020 (ANSI CTA 6033) This is the US National Adoption of Audio, video and multimedia systems General channel assignment of multichannel audio IEC 62574: 2020. IEC 62574: 2020 specifies the general channel assignment and the metadata for multichannel audio format. This document, with its channel mapping and labelling content, provides