> I don't even have speakers attached to the computer. only headphones attached to the mixer.
Right, it doesn't matter whether you're listening on speakers or headphones. The point is you're already listening to that signal so adding a PFL button for it would be useless. There is a cost to adding a PFL button for the Record/Broadcast input. It would clutter the GUI, confuse users, and complicate the EngineMaster code.
> I don't even have speakers attached to the computer. only headphones attached to the mixer.
Right, it doesn't matter whether you're listening on speakers or headphones. The point is you're already listening to that signal so adding a PFL button for it would be useless. There is a cost to adding a PFL button for the Record/Broadcast input. It would clutter the GUI, confuse users, and complicate the EngineMaster code.