Question about SC 1.4.2 - can this be met by relying on Windows (or otherwise the platform or user agent) to do it for you?

Colleagues,

I was recently reminded that Windows 7 (and perhaps earlier) has a nice 
feature in the "Volume Mixer" panel, which provides support for 
independent, per-application setting of the volume level (including 
per-application muting).  This specifically allows me to turn down or 
off the volume of all audio coming from my web user agent.

Would you agree that this would be "a mechanism [that] is available to 
control audio volume independently from the overall system volume 
level", such that web pages/apps running on Windows 7 could 
automatically meet SC 1.4.2 Audio Control?

If so, is this perhaps a potential new success technique for us? 
Something like "Running on a platform or user agent that allows the 
volume level to be adjusted or muted either by the user agent or on a 
per-application basis"?


On the other hand...  would doing this effectively prevent the use of 
cloud-based AT?  If I'm not mistaken, we typically haven't done a lot in 
our techniques that contemplates web-delivered/cloud-based AT...


Regards,

Peter
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Peter Korn | Accessibility Principal
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