Recently I have started to fly my ArduCopter with camera piloting by video goggles. All is fine, but sometimes it might be difficult to estimate altitude and vertical speed (which are very important!) accurately. OSD is a solution, however, there is another good way, I think. It would be great to have voice alarm messages (optional of course) in APM Planner in case of high vertical speed or low altitude. And if the altitude is below 1 or 2 meters for example, the voice would pronounce current altitude rather frequently, every 1 or 2 seconds. Is it possible to add this functionality? Thanks in advance!