Can not hear anybody on mumble

[Cassius]

My mumble is not working. People can hear me, but I dont hear them and the icons of people talking on mumble are not flashing up either. I tried to restart mumble made sure I ain't muted or deafened and checked that the input and output drivers are selected correctly in mumble (they were). I tried deleting and retrieving my profile too.

Any idea what it is?