Turn off non-positional audio

[KingKong]

I'm sorry for posting this as a question, but I did research, and I couldn't find an answer.
Is there a way to turn off non-positional audio in Mumble, and leave only positional? In Project Reality a customized version of Mumble is used. It's pretty much the same as Mumble. The problem is, many players talk a lot using positional audio. An option to turn that off would be great.

[kissaki]

You can disable positional audio for all normal audio.

I am not aware of an option to silence all non-positional audio. And I’m not sure I see the use case. If someones game crashes, he wouldn't even be able to tell you.