I thought you might be interested in looking at Mumble compatible with ArmA2?.
https://forums.bohemia.net/forums/topic/73626-mumble-compatible-with-arma2/?do=findComment&comment=1310622
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.