UE4 doesn’t really support spatializing VOIP out of the box. I worked with a licensee this year who wanted that for their game and made some suggestions on how they might approach it. It’s essentially a problem of getting a procedural voice to spatialize like other sounds. VOIP spatialization wasn’t a priority for us to support and I probably won’t be able to get to dealing with VOIP-related features until after we get our multi-platform mixer (and other related things) off the ground.