applications don't show up on volume meter windows 10

[Virgin with rage]

i was playing a game the other day and the sound suddenly cut out, thought it was related to that game as youtube and system sounds still worked but when i tried to play doom 2 or any other game sound didn't work for them either so then it was obvious it wasn't a problem with those. so i open the volume mixer and nothing is displaying on it except for the device/speaker/master volume part, anyone have any ideas on how to fix this? not been able to find anything on the internet

picture of what im talking about - https://drive.google.com/file/d/0B09YthBbQOgebDBHQzhkaFNkTG8/view?usp=sharing

(also i've tried restarting before you ask)

[Bad 💀 Motha]

Master Volume is all u will see unless u click "Mixer"

And apps don't show down there in Mixer if they are not open.

Could be sound driver perhaps. What do u have for Motherboard / Audio?

Make sure Playback > Advanced is setup for 16bit / 48khz ~ otherwise some games may have issues if 24bit is enabled.