Teamspeak is a VoIP (Voice over Internet Protocol) application, so you can talk to people over the internet much like Discord. It is older than Discord, but I have a soft spot for it despite it being pretty much dead due to Discord's popularity, but SpaceHey is literally a throwback of a dead social media platform so it is fitting.
No one uses Teamspeak anymore, but I made one for fun using Amazon Web Services. If you want to join you are free to! When i'm on my desktop PC I will most likely be chilling there muted.
Once you installed the program, you can join it with this link