JD_Toims - 6:20 pm on Sep 19, 2013 (gmt 0)
There is a list defined within HTML 4.01.
Future versions of HTML may introduce new values and may allow parameterized values.
They already have and it's been switched to CSS. That's why I posted.
The HTML4 list -- All emphasis below added:
Note: CSS2 had a similar media type called 'aural' for this purpose. See the appendix on aural style sheets for details.
[The preceding is in reference to the addition of "screen" and deprecation of "aural" in CSS 2.1 -- Currently the CSS recommendation.]
We expect that in a future level of CSS there will be new properties and values defined for speech output. Therefore CSS 2.1 reserves the 'speech' media type (see chapter 7, "Media types"), but does not yet define which properties do or do not apply to it.
The properties in this appendix apply to a media type 'aural', that was introduced in CSS2. The type 'aural' is now deprecated.