[ttml2] Pull Request: Move audio styling attributes to main styling section (#591).

skynavga has just submitted a new pull request for https://github.com/w3c/ttml2:

== Move audio styling attributes to main styling section (#591). ==
Closes #591.

See https://github.com/w3c/ttml2/pull/778

Received on Friday, 18 May 2018 23:37:47 UTC