Single/Multiplayer, Touch & Vive blueprint only Template

Quick offtopic question:
Is there a way to disable the voice integration and implement another?
I cant find the spots where you implemented the system. Can you walk trough the steps? or is that just the bVoice=true and everything else is native ue4?
I wanted to implement the ultimate voice chat trough the marketplace. but now i hear both systems at the same time.