Yes, keybinds in gaming oriented VoIP apps can be global, you can press them from anywhere, or at least a select set of apps where an overlay is configured. This includes Discord (at least in the electron app).
As to why? It depends on the game, but Eve Online can get the most complicated.
The most complex set up I can recall offhand, was when we were in cross coalition operations, where I had 2 mumbles and a teamspeak up where the teamspeak had 3 separate server tabs. It was my alliance mumble, my coalition mumble, other coalition teamspeak, my corp teamspeak, and half way through the operation we had to change the other coalition teamspeak servers to a backup because of what looked like a ddos.
(In eve you have players who join a corporation, who join an alliance, who form a coalition. Coalitions are not internal to the game mechanics and often incorporate multiple timezone and language groups.)
As a side note, the open source mumble is popular because the corp/coalition/alliance IT services can easily configure it to work with external authorization systems, like the SSO provided in the Eve API or in [1]. For small orgs where security is less of a concern, you are probably better off with a discord server.
As to why? It depends on the game, but Eve Online can get the most complicated. The most complex set up I can recall offhand, was when we were in cross coalition operations, where I had 2 mumbles and a teamspeak up where the teamspeak had 3 separate server tabs. It was my alliance mumble, my coalition mumble, other coalition teamspeak, my corp teamspeak, and half way through the operation we had to change the other coalition teamspeak servers to a backup because of what looked like a ddos. (In eve you have players who join a corporation, who join an alliance, who form a coalition. Coalitions are not internal to the game mechanics and often incorporate multiple timezone and language groups.)
As a side note, the open source mumble is popular because the corp/coalition/alliance IT services can easily configure it to work with external authorization systems, like the SSO provided in the Eve API or in [1]. For small orgs where security is less of a concern, you are probably better off with a discord server.
[1] https://gitlab.com/allianceauth/allianceauth