Hi !
I’ve already made a VoIP setup on a LAN game with Unreal 4.15.
I have created a new project from scratch with 4.16.2, but I can’t make VoIP work.
I made the same setup, but maybe I am missing something 
Would you mind taking a look ?
On the DefaultEngine.ini, I got these lines :
[OnlineSubsystem]
DefaultPlatformService=null
bHasVoiceEnabled=true
PollingIntervalInMs=20
VoiceNotificationDelta=0.2
[Voice]
bEnabled=true
On theDefaultGame.ini, I got :
[/Script/Engine.GameSession]
bRequiresPushToTalk=false
On my Project Settings, I have a Sound Class:
I just have created a new Sound Class, I did nothing inside it
On windows, I have set the microphone as “Default communication device” on both computers.
When I launch the packaged game on both computers, no VoIP.
If I do a “online test voice”, I can hear my own microphone, but still not the other player…
I don’t know what to do more
If someone have an idea, do not hesitate.
MacGeorges