Nokia Cam (and Beta) Speaker hiss on 8.1

[sdreamer]

Wasn't exactly sure where to put this, but does anyone notice a speaker hiss now when using Nokia Cam? I've tried it with the beta as well and the same issue. Normal camera app doesn't seem to exhibit this, but I do notice something like a CPU whine. Using a Nokia Lumia 920.

EDIT: Probably an app issue, goes away when muting the phone.