Description of new capture options and automatic closing of ts3 when starting the game

Hello. After upgrading Team Speak 3 to version 3.5.0 in the Capture options, the capture option has appeared: Automatic, Volume Gate and Hybrid. Is there any description of these options how do they differ? I tested them all and I don’t feel the difference.
I will take this opportunity to ask: when starting the game PUBG Team Speak 3 is automatically closed. Only when running this game and only Ts3, other programs are ok. Can anything be done about it?