#1 - April 16, 2018, 8:21 a.m.
You'll find the voice chat controls along the left side of the text chat window, and you can configure your devices and push-to-talk in the Voice Chat section of System settings.
It's worth noting that voice chat should currently only be available for players in a party channel.
Please feel free to post your feedback on this new feature here in this thread.
Thank you!