[orca-list] Muting the mike in big blue button while Orca is running

[Sébastien Hinderer <Sebastien Hinderer ens-lyon org>]

Dear all,

When talking in Big Blue Button, there is a shortcut to mute the
microphone, namely Alt-Shift-M.

I was however not able to use that shortcut and am wondering whether
this has to do with Orca or not. I did try the Roka+Backspace prefix to
pass the next keystroke to the current application but wasn't more
successful.

If anybody knows how to deal with this I would be more than interested.

Many thanks in advance for any help,

Sébastien.