Loss of character/announcer voices through headphones (PC)

Whenever I use my headphones I don’t get the announcer or voices. This happened me a couple betas ago too. Anyone else have this problem?

i got the same problem with my speaker,look like this is a surround problem,dunno if that can help you.

Yeah so if I turn 7.1 on I get the voices back. The problem only happens in stereo.