Re Discord, this is a VOIP application, primarily. We use it for voice whilst playing. The latest version has video chat as well, but my group just uses voice. It was originally intended as voice chat for people playing online shooters and so on. It is free unless you want to pay a top-up (we haven’t). A Discord server is basically a channel you set up and is how you keep your voice channel private to the people you invite to it.
Fantasy Grounds doesn’t have any voice-chat built in. I understand that Roll20 does but most people find it poor so use a stand-alone VOIP app.
Beware that we have found it unstable when used in combination with FGU, so people tend to use a secondary device like their smart phone. (This also makes it easy to get another drink from the fridge mid-game...)
Fantasy Grounds doesn’t have any voice-chat built in. I understand that Roll20 does but most people find it poor so use a stand-alone VOIP app.
Beware that we have found it unstable when used in combination with FGU, so people tend to use a secondary device like their smart phone. (This also makes it easy to get another drink from the fridge mid-game...)