Full HD and i have setup my asound.conf.
Citra is the only one without sound...
Well I have a 1080p panel too and neither in Dolphin nor Citra are menues too big
The sound in citra breaks sometimes while playing around in menues so setup the emulator and run it again. It's compiled with SDL2 sound only so if your asound.conf is correct you must have sound in citra too. Otherwise you have too chose you output device in Emulation/Configure/System/Audio.
Can you upload a picture of your oversized menues?