How to setup Commentator (Caster) feature for Source TV?

[vbearn]

Hi,

I've managed to run SourceTV for Dota2
(a guide here: https://forums.alliedmods.net/showthread.php?t=233463 )

But in official games, there's always a Broadcaster/Commentator/Caster channel in SourceTV, which basically is a person who voice comments on games and every watcher of TV can listen to it.

The problem is, I can't force TV Clients to listen to voice chats, said by a specific user.

Can anyone help me with this issue?