https://mpeg.chiariglione.org/standards/mpeg-dash/media-presentation-description-and-segment-formats/text-isoiec-23009-12012-dam-1.html
Text of ISO/IEC 23009-1:2012 DAM 1 Support for Event Messages and Extended Audio Channel...
support forextended audiotextisoiec
https://www.w3.org/WAI/WCAG22/Understanding/extended-audio-description-prerecorded
Understanding Success Criterion 1.2.7: Extended Audio Description (Prerecorded) | WAI | W3C
extended audiounderstandingsuccesscriteriondescription
https://www.w3.org/WAI/WCAG21/Understanding/extended-audio-description-prerecorded.html
Understanding Success Criterion 1.2.7: Extended Audio Description (Prerecorded) | WAI | W3C
extended audiounderstandingsuccesscriteriondescription
https://www.w3.org/WAI/WCAG22/Techniques/smil/SM2
SM2: Adding extended audio description in SMIL 2.0 | WAI | W3C
extended audiosm2addingdescriptionsmil
https://www.w3.org/WAI/WCAG22/Understanding/extended-audio-description-prerecorded.html
Understanding Success Criterion 1.2.7: Extended Audio Description (Prerecorded) | WAI | W3C
extended audiounderstandingsuccesscriteriondescription
https://www.cepro.com/news/adi-release-episode-4-zone-streaming-preamp-with-ryff-control4-support/626486/
ADI Just Extended Its Ryff Audio Streaming Platform to the Episode Series - CEPRO
Apr 21, 2026 - The latest streaming preamp Episode can stand on its own as part of a dedicated audio system, but can just as easily be incorporated into a Control4 setup.
audio streaming
https://www.focusproaudio.com/collections/popular-products/products/fender-2779100109-loudspeakers-pa-speakers-systems-live-sound-subwoofers
PreSonus Air XD Sub 15 1x15 Inch 2000W Active Extended Definition Subw – Focus Pro Audio
The PreSonus Air XD Sub 15 is a powerful active subwoofer engineered for professional audio applications, delivering deep, extended low-frequency performance...
focus pro audiopresonusairxdsub