For the people who wanted voice support, here it is!
However, as I’ve not yet determined whether I can distribute the Vivox components or not, I’ve marked them non-redistributable as a precaution. So to get that working you will have to install the standard 184.108.40.206 viewer first, then mine. I’ll change that if I determine that Vivox files can be safely included.
Update: Confirmed that voice components are unfortunately not redistributable. That means that an install of the standard 220.127.116.11 viewer will be needed, so that my installer can grab the files from it.