Network Replication Advice

When dealing with multiplayer games, bandwidth and packet sizes have to be considered.

Sending too much too quickly (multi cast events on Event Tick) impacts network performance and prevents voice chat from being sent as the network is too saturated.

Make sure you consider every replicated variable, event and blueprint node that is run over the network.

Many problems can be fixed by optimizing your networking replication!

Common Issues and Fixes

Players can’t hear voice chat after joining (UE 4.25)

• Run the “Register Remote Talker” function on begin play for your character actors. Suggested by CouchLearn user pftq

This can be done with C++ or the Advanced Sessions Plugin.

https://docs.unrealengine.com/en-US/API/Plugins/OnlineSubsystem/Interfaces/IOnlineVoice/RegisterRemoteTalker/index.html

Voice chat audio is not following the character

• Check your character/pawn is replicated and has replicate movement enabled.

No voice chat audio

• Follow our voice chat tutorial exactly and make sure to double check each step.
• Make sure you are using the multiplayer session system.
• Make sure that both players have a working microphone plugged in.
  
  If those steps didn’t fix the problem try:
• Following the “Stuttering or Robotic Sounding Voices” steps.

Stuttering or Robotic Sounding Voices

• Reducing the number of replicated events running on Event Tick and on timers.
• Make sure only essential events are replicated.
• Reduce the amount of multi cast events.
• Remove redundant parameters from replicated events.
• Remove audio and texture parameters from multi cast events.
• Lower your mic threshold value by -5

Voice chat only works on certain levels

• Make sure your other maps have an actor that is setup for voice chat on a key press.
• When changing levels make sure to use the servertravel command
  
  If those steps didn’t fix the problem try:
• Following the “Stuttering or Robotic Sounding Voices” steps.
  – Some levels in your game may include actors have poor replication performance.

Positional voice chat isn’t working

• Follow our positional voice chat tutorial exactly and make sure to double check each step.
• Make sure you are using the multiplayer session system.
• Lower your mic threshold value by -5
• Make sure that both players have a working microphone plugged in.
• Increase the volume of the VOIP audio class.
• Ensure your VOIPTalker’s attach to component is set.
• Replicated your VOIPTalker enabled actor.
• Make sure your VOIPTalker sound attenuation is assigned and setup correctly.
  
  If those steps didn’t fix the problem try:
• Following the “Stuttering or Robotic Sounding Voices” steps.

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