[ttml2] Does tts:display affect audio presentation?

nigelmegitt has just created a new issue for https://github.com/w3c/ttml2:

== Does tts:display affect audio presentation? ==
It is unclear whether setting `tts:display="none"` prevents visual presentation only or also affects audio presentation. Clarify this, potentially by adding a keyword `audio` to mean "present in audio form only, not in visual form", and where `none` means "don't present in any form, visual or audio".

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/1012 using your GitHub account

Received on Tuesday, 23 October 2018 14:38:55 UTC