ARIA tag for musical score

[mscuthbert]

I was wondering what the proper "aria-role" would be for a musical score, especially one rendered as SVG etc. or one rendered in Braille Music Code? I am thinking about content like:

<svg aria-role="?musical-score-img?" aria-labeledby="score1_braille">
       ... a million Path objects that convey no information to a screen-reader user...
</svg>
<pre class="sr-only" aria-role="?musical-score-braille" id="score1_braille">
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠩⠩⠩⠨⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠼⠚⠀⠨⠙⠚⠀⠪⠺⠹⠣⠇⠫⠀⠹⠺⠪⠣⠇⠹⠀⠊⠚⠳⠻⠣⠇⠪⠀⠺⠺⠻⠫⠀⠪⠺⠹⠣⠇⠹
⠀⠀⠐⠪⠺⠹⠪⠀⠳⠻⠗⠣⠇⠀⠟⠻⠻⠈⠉⠀⠻⠛⠩⠋⠻⠣⠇⠣⠅
</pre>

Math equations have a defined Aria role but musical scores do not. I would like to label the musical outputs from my program properly if possible. Thanks!

[pkra]

This seems more like a question for ARIA Authoring Practices (on how to build accessible musical notation).

For the braille part, there's the proposed aria-braillelabel https://w3c.github.io/aria/#aria-braillelabel that is targeted for ARIA 1.3. As it turns out, I plan to use musical notation as an example for w3c/aria-practices#1825 -- musical notation is one of the rare cases where braille-specific labels might be justified.

[alastc]

I agree with @pkra that this is better aimed at the ARIA practices.

From a WCAG point of view if there isn't a suitable role available (and implemented in AT), then having a good preceding heading and/or a text description of the image/pre would be appropriate.

If that makes sense can we close this issue? I can't see any changes we'd make to the WCAG documentation based on this issue.

[pkra]

@alastc if there's someone with sufficient privileges in both repositories, perhaps the issue could be transferred.

[alastc]

That isn't me, I'm not sure there is overlap. Might be easiest for @mscuthbert to just copy to the ARIA repo.

[bruce-usab]

@mscuthbert be sure to ping @JaninaSajka as she almost certainly has some practical ideas. I agree that this is out of scope for WCAG. I would like to promote better HTML support for both dynamic braille displays and braille hard copy but I am not sure where the opportunities are.

[mscuthbert]

Thanks for the great comments and for pointing me in the right direction and getting me in touch with a great person who may have ideas. What a wonderfully welcoming community. I'll close the comment since there's no action at least at present here.